Write a Python program which performs the following: . (1) Define the mul function which has two parameters num1 and num2. It calculates the product of the two parameters, then returns the result. (2) Define the main function which firstly asks user to enter two numbers. Then, it calls the mul function to calculate the product of the two user-entered numbers (the two user-entered numbers need to be passed over as arguments). The returned value should be printed out in the main function. (3) Execute the program by calling the main function. [Run your program in Python IDLE to get rid of syntax errors and verify if the program works correctly as described above. Program that cannot run due to syntax error(s) will receive 0 point.]