List the elements (using proper symbology) for the following sets. For each, provide a brief description of the process you employed to ascertain the solution. (a) {x|x is enrolled in this course and currently resides in Hawaii} (b) {x N|(x < 30) (x is a multiple of 5)} 1 (c) {r R|r 2 = 1.21} (d) {b Z|b (3, 4)}