use python

Write a Python program which performs the following: (1) Define the cal_avg function which has three parameters: num1, num2 and num3. It calculates the average value of the three parameters, then returns the average value. - (2) Define the main function which firstly asks the user to enter three integer numbers. Then, it calls the cal_avg function and passes over the three user-entered numbers as arguments. The returned result should be printed out in the main function. - (3) Execute the program by calling the main function. [Run your program in Python IDLE to verify if it works correctly as described above]