Rumour has it that the next version of the processor that your company will be using will heavily optimize class C instructions. Consider the following facts: Given: Instruction classes A, B, C, D CPI for each instruction class: A,2; B,2; C,1; D,2 Possible code sequences for instruction class order A, B, C, D under review for compiler team to adopt: Code sequences: s1: 2, 1, 1, 1; s2: 1, 2, 1, 1; s3: 1,1, 2, 1; s4: 1, 1, 1, 3 Which code sequence will be fastest? s2: 1,2, 1,1 s3: 1,1, 2,1