Please use Python code

Write a Python program (with comments) to do the following: a Define a function replace_abc (str1, char1) that takes a string str1 and a single character char1 as input. The function returns an updated string, where all occurrences of the letters 'a', 'b', or 'c' have been replaced by char1 b Define a variable mystr = "It is a book about abc's" and print mystr c. Call the above function with the string mystr and the single character '*' as inputs and print the value of returned by the function. A sample output is shown below