Section 7.2 2.a. Determine all bijections from { 1, 2, 3 } into {a, b, c}. Justification and answer 2.b. Determine all bijections from the { 1, 2, 3 } into fa, b, c, d}. Justification and answer4. Which of the following are injections, surjectiver bijections on K, the set of real numbers? . a. f(x) = -2x. Justification and answer . b. g(x) = x- - 1. Justification and answer . c. h(x) = x, x > 0. Justification and answer . d. q(2) -2 Justification and answer Justification and answer . f. s( 1) =P-r. Justification and