Decide whether each map is an isomorphism (if it is an isomorphism then prove it and if it isn't then state a condition that it fails to satisfy).
(a) f: M2×2 †’ R given by

(b) f: M2×2 †’ R4 given by

(c) f: M2×2 †’ P3 given by

(d) f: M2×2 †’ P3 given by

(e )be c d (2)e abcd a b+c a b Cl a b