functine the following mathematical operations as relations. Are the relations defined partial functions, total functions, or neither? ) The relation (a + b) = c, where a, b, and c are natural numbers (it will be the form (a,b)RC) b) The cubic function b = a3 on the set of integers. c) The set of all a/b such that a b/2. d) The set of all pairs (a.b) such that a and b are distinct natural numbers and the two share common divisor other than the other. (either a or b must cleanly divide into the other, and ther Is no other divisor shared between them). What condition must either a or b hold