Question

(a)   If x is nonnegative, then x is positive or x is 0. 

Answer 1

(a) Negotation

x is negative and x is not positive and x is not 0.

(b) Contrapositive

If x is not positive and x is not 0, then x is not nonnegative.

(c) Converse

If x is positive or x is 0, then x is nonnegative.

(d) Inverse

If x is not nonnegative, then both x is not positive and x is not 0.