1. Write a program that uses a function named copy_array to copy an initialized array.
2. Write a program that uses a function named copy_array2 to copy a 2D array that is defined and initialized in main.
3. Write a program that uses a function named day_diff to compute the number of days between two days of the same year (both days inclusive). The days are input in the format DD:MM and don’t relate to a leap year.
4. Devise a function named time2download that accepts the Internet speed in Mbps and fi le size in MB as two arguments. The function should return the download time in hours as a floating point number. (Note: Speed uses bits and fi le size uses bytes.)