have time limitation please help me :(

Write a function intersect() that takes five arguments: an array of integers, number of elements in this array, a second array of integers, number of elements in the second array, a third array as parameters; finds the numbers in the first array that also exist in the second array and places these numbers into the third array; returns the number of matching values stored in array- 3.

Prototype: int intersect(int ar1[], int n1, int ar2[], int n2, int ar3[]

2)

Write a C function delWordN() that takes a string and an integer (n) as parameter, removes from the string the words that are n character long. A word is a group of consecutive alphanumeric characters; words are separated by non-alphanumeric characters.