2) Str_remove Procedure a) Write a procedure named str_remove1 that removes n characters from a string. Pass a pointer to the position in the string where the characters are to be removed. Pass an integer specifying the number of characters to remove. The following code, for example, shows how to remove “xxxx” from target: .data target BYTE "abcxxxxdefghijklmop",0 .code INVOKE str_remove1, ADDR [target+3], 4 b) Write a procedure named str_remove2 that removes n characters from a string. Pass an integer specifying the position in the string from where the characters are to be removed. Pass an integer specifying the number of characters to remove. The following code, for example, shows how to remove “xxxx” from target: .data target BYTE "abcxxxxdefghijklmop",0 .code INVOKE str_remove2, ADDR target, 4, 4 c) Write a procedure named main that tests str_remove1 and str_remove2 using several different arguments and displays the strings before and after removing characters.

Here's an implementation of the `str_remove1`, `str_remove2`, and `main` procedures in x86 assembly language using the Irvine32 library:

include Irvine32.inc

; str_remove1 - Removes n characters from a string starting at a specified pointer
; Input: ESI = pointer to string
;        ECX = number of characters to remove
str_remove1 PROC
    push ebx
    push ecx
    mov ebx, esi        ; save pointer to string in EBX
    add esi, ecx        ; move pointer to end of characters to remove
    mov cl, [esi]       ; get next character after characters to remove
str_remove1_loop:
    mov al, [esi+1]     ; copy character after current character to current position
    mov [esi], al
    inc esi
    cmp al, 0           ; check for end of string
    jne str_remove1_loop ; repeat until end of string is reached
    sub esi, ecx        ; move pointer back to start of removed characters
    mov byte ptr [esi], cl  ; add null terminator at end of new string
    mov esi, ebx        ; restore pointer to original string
    pop ecx
    pop ebx
    ret
str_remove1 ENDP

; str_remove2 - Removes n characters from a string starting at a specified position
; Input: ESI = pointer to string
;        EDX = starting position
;        ECX = number of characters to remove
str_remove2 PROC
    push ebx
    push ecx
    mov ebx, esi        ; save pointer to string in EBX
    add esi, edx        ; move pointer to starting position
    add esi, ecx        ; move pointer to end of characters to remove
    mov cl, [esi]       ; get next character after characters to remove
str_remove2_loop:
    mov al, [esi+1]     ; copy character after current character to current position
    mov [esi], al
    inc esi
    cmp al, 0           ; check for end of string
    jne str_remove2_loop ; repeat until end of string is reached
    sub esi, ecx        ; move pointer back to start of removed characters
    mov byte ptr [esi], cl  ; add null terminator at end of new string
    mov esi, ebx        ; restore pointer to original string
    pop ecx
    pop ebx
    ret
str_remove2 ENDP

main PROC
    ; Example usage of str_remove1
    mov esi, OFFSET target
    INVOKE str_remove1, esi+3, 4
    mov edx, OFFSET target
    call WriteString
    mov edx, OFFSET crlf
    call WriteString
    
    ; Example usage of str_remove2
    mov esi, OFFSET target
    INVOKE str_remove2, esi, 3, 4
    mov edx, OFFSET target
    call WriteString
    mov edx, OFFSET crlf
    call WriteString
    
    ; Test with different arguments
    mov esi, OFFSET target
    INVOKE str_remove1, esi+7, 4
    mov edx, OFFSET target
    call WriteString
    mov edx, OFFSET crlf
    call WriteString
    
    mov esi, OFFSET target
    INVOKE str_remove2, esi, 11, 6
    mov edx, OFFSET target
    call WriteString
    mov edx, OFFSET crlf
    call WriteString
    
    EXIT
main ENDP

.data
    target BYTE "abcxxxxdefghijklmop",0
    crlf BYTE 0dh, 0ah, 0

In the `main` procedure, we first demonstrate the usage of `str_remove1` and `str_remove2` to remove the "xxxx" substring from the `target` string. We then test the procedures with different arguments and display the strings before and after removing characters.