Consider schedules S3, S4, and S5 below. Determine whether each schedule is strict, cascadeless, recoverable, or nonrecoverable. (Determine the strictest recoverability condition that each schedule satisfies.)
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;