1. If an engineer is asked to rate the performance of a new machine with respect to its replacement as poor, not satisfactory, no change, satisfactory, or excellent, we might assign these alternatives the codes, 1, 2, 3, 4, and 5. If i3 = {1, 2}, O, = {4, S}, R = {2, 3}, and S = {3, 4, 5}, express each of the following symbolically by listing its elements and also in yyonds. (a) P u R {HPHR (ciEUE {d}