Identify the data dependency in the following code sequence between instruction 11 and 14 Instruction 11: 12: 13: 14: 15: add $r2, $ri, $r3 sub $r4, $r2, $r1 and $r5, $ri, $r2 sub $r6, $r2, $r4 add $r7, $r2, $r3 4 a. There is no dependency O b. RAW data hazard O C WAR data hazard O d. WAW data hazard Identify the data dependency in the following code sequence between instruction 11 and 12 Instruction I1: 12: 13: 14: 15: add $r2, $ri, $r3 sub $r4, $r2, $r1 and $r5, $r1, $r2 sub $r6, $r2, $r4 add $r7, $r2, $r3 O a. WAW data hazard O b. There is no dependency OC. RAW data hazard d. WAR data hazard