12. Loops are a basic structure found within program code. outperforms a 1-bit dynamic branch prediction scheme when looping occurs. De scribe how a two-bit dynamic branch prediction sche 3. For the following instruction sequence, we assume that O if an instruction is decoded in cycle n, execu in cycle n+1.For addition and subtraction, the writeback to the destination register occurs at the n+2. For multiplication, the writeback occurs at the end of cycle n+3. The decoding un inctructions per cycle. Please answer for each