1. Consider the following MIPS Assembly code 16 lw 220 sub. 24 beq 28 add 32 sub 36 sub 40 and 44 beq 948 add 10 52 or 1156 add 12 60 slt 820, 7(810) $11, $20, $16 $12, $21, 4 $24, 80, $2 1 $10, $4, 88 $3, $10, $1 $22, 82, 85 $24, 820, -4 $4, $24, $12 $26 $5, $16 $4, $14, $12 $5, $26, $7 [15] (a) Identify all the data dependencies in the above code. (Write instruction numbers and register number) [3] (b) Which dependencies are data hazards that will be resolved by forwarding and which dependencies are data hazards that will cause a stall? [3] [2] [2] (c) Write the values of ForwardA and ForwardB for each forwarding. (d) Find the branch targets for both branch instructions. (e) If the branch execution is still in the MEM stage, how many instructions (total) will be flushed, if the branch is taken? Also, write the instruction numbers which will be flushed. [2] (f) If the branch execution is in the ID stage, how many instructions (total) will be flushed, if the branch is taken? Also, write the instruction numbers which will be flushed. (g) Identify error(s) in the preceding code, if any. [2] [1]