Write this program please, it is emergency

Write a C program which defines and calls the following two functions
to demonstrate its use. The prototypes and descriptions are given below.

int square_c(int);

^^^ Will compute the square of the argument and return its value

int lookup_c(char);

^^^ Will check to see whether the argument character is a
alphabet [ uppercase or lower case] and return 0 if so.
The function will return 1 if the argument character is not
a alphabet character.

Define the above functions and use them in your C program.

Thank you soooooooo much for your help, I need this as soon as possible.
Thank you once again!!!!!!!