1. For each of the following schedules, decide whether it is an unrecoverable, recoverable, cascadeless or strict schedule. If a schedule fits several of the categories, then specify the strictest category. You are required to briefly explain your answer for each schedule. (18 pts) a) r3[z], r1[y], w2[x], c2, w3[z], c3, r1[x], w1[z]. b) r1[x], w2[y], w1[x], r3[z], c1, r3[x], w3[y], c2. c) w2[y], w1[y], r3[y], w3[y], c2, c3.