please answer this asap!!!

Consider schedules Sa, Sb, and Sc below. i) Determine whether each schedule is strict, cascade-less, recoverable, or non-recoverable. [8] ii) Determine if Sa is serializable or not. [2] Sd: r1(x); r2(y): w1(x); c1; r2(x); w2(y): c2; r3(x); 13(z); w3(z); c3; Sa: r1(x); r2(z); r1(z); r3(x); r3(y); w1(x); w3(y); c1; 12(y); w2(z); w2(y); c2; c3; Sb: r1(x); r2(z); r1(z); w1(x); 13(y); r3(x); w3(y); r2(y); w2(z); w2(y); c1; c3; c2; Sc: r1(x); w1(x); c1; 12(z); r3(y); w2(z); w3(y); c2; r5(z); c3; r4(y); w5(2); w4(y); a4; c5; [Note: Following notations are used: r1(X) - Read operation performed on data item X by transaction 1. w2(Y) - Write operation performed on data item Y by transaction 2 a4 - abort by transaction 4. c5 - transaction 5 committed.] [Assume data value iff it is missingeeded