Write a recursive C function which receives an array of 10 integer elements and a key value. The function should search for the key and return its index if found, otherwise it should return -1. Use linear search. In main do the following: 1. Fill in the array from user. 2. Read in a key from user. 3. Pass the array and the key to the function. 4. Print "found" and the index value if found, otherwise print "not found".