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i need help quickly plz

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Question 9 Not yet answered Marked out of 4.00 Consider the following sequence and r1, r2, r3 #instruction 1 and r2, r1, r4 #instruction 2 and r2, r1, r4 #instruction 3 From instruction 1 to instruction 3, and relatively to r2, there is Select one: O a. read after write dependency O b. write after write dependency O c. read after read dependency Od write after read dependency Question 10 Not yet answered Marked out of 4.00 Consider the following sequence and r1, r2, r3 #instruction 1 and r2, r1, r4 #instruction 2 and r1, r2, r2 #instruction 3 From instruction 1 to instruction 3, and relatively to r1, there is Select one: a. write after write dependency O b. write after read dependency O c. read after read dependency O d. read after write dependency