Consider the schedules S3, S4, and S5 .

S3 : r1 (x); r2 (z); r1(z); r3 (x); r3(y); w1(x); c1; w3 (y); c3; r2 (y); w2(z); w2(y); c2 S4 : r1 (x); r2 (z); r1(z); r3 (x); r3(y); w1(x); w3(y); r2(y); w2 (z); w2(y); c1; c2 ; c3; S5 : r1(x); r2 (z); r3(x); r1(z); r2 (y); r3(y); w1 (x); c1; w2(z); w3 (y); w2(y); c3 ; c2;

A. Determine whether each schedule is strict. Justify your answers. B. Determine whether each schedule is cascade-less. Justify your answers. C. Assume that T2 aborted (i.e., c2 is replaced by a2 in each schedule), determine whether each schedule is recoverable or non-recoverable. Justify your answers. D. Assume that T3 aborted (i.e., c3 is replaced by a3 in each schedule), determine whether each schedule is recoverable or non-recoverable. Justify your answers.