定义父类 Father， 有age,name 属性，定义speak(方法 打印 介绍信息。定义2个子类，boy和gril两个子类，分别实现重写speak0方

法，输出自己的介绍信息。

以下是代码示例：

class Father:
    def __init__(self, age, name):
        self.age = age
        self.name = name
    
    def speak(self):
        print("Hello, my name is", self.name, "and I am", self.age, "years old.")
    
class Boy(Father):
    def speak(self):
        print("Hi, I am a boy. My name is", self.name, "and I am", self.age, "years old.")
    
class Girl(Father):
    def speak(self):
        print("Hi, I am a girl. My name is", self.name, "and I am", self.age, "years old.")

# 测试
father = Father(50, "John")
father.speak()

boy = Boy(10, "Tom")
boy.speak()

girl = Girl(8, "Lily")
girl.speak()

输出结果如下：

Hello, my name is John and I am 50 years old.
Hi, I am a boy. My name is Tom and I am 10 years old.
Hi, I am a girl. My name is Lily and I am 8 years old.