Consider the following schedules and check whether these schedules serializable or not using the precedence graph. And also write down the equivalent serial schedules for each serializable schedule

i) S1: w3(A);w2(B);r3(C);w1(D);r2(A); ii)S2: w2(A);w1(D);r1(A);r3(C);w3(C); iii)S3: w1(A);w3(C);r2(B);w2(D);r2(A); iv)S4: w2(B);w1(D); w3(A);r1(D); r2(A);