C Program with 5 functions

Function descriptions: int roll( int ) Purpose: roll a dice, return the value Params: how many sides on the dice If # of sides is outside 1 to 50 range, return 4 int isVowel( char ) Purpose: determine if character is a vowel, return 1 for yes, 0 for no Params: a character char toGrade( int ) Purpose: convert numeric score to letter grade, standard 90-80-70… Params: integer representing score If score is outside 0 to 100 legal range, return a "?" int fullCartons( int ) Purpose: how egg cartons (dozen) can be filled Params: number of eggs void zigzag( int ) Purpose: make 1 zig-zag bump Params: height of the zig