I need some help writing this program in C (not C++)

Create a program that performs the following tasks .Define a macro arraySize of size n . Create two arrays of sizen Pass these arrays to a function fillArrays that randomizes enough integers between 1-100 (inclusive) to fill both arrays. Print both of these arrays. Pass the filled arrays to a second function mergeArrays that creates a third array of size 2n. Still in mergeArrays, store the values from the original two arrays into your new array in reverse. Print out your sorted array