Assume our $5$ stage pipelined processor. For each code sequence below, state whether it much stall, can avoid stalls using only forwarding, or can execute without stalling or forwarding. $($briefly explain why$)$ a$.(3$ points$)$ Sequence: lw x$10,0($x$10)$ add x$11,$ x$10,$ x$10$ b$.(3$ points$)$ Sequence: add x$11,$ x$10,$ x$10$ addi x$12,$ x$10,5$ addi x$14,$ x$11,5$ c$.(4$ points$)$ Sequence: addi x$11,$ x$10,1$ addi x$12,$ x$10,2$ addi x$13,$ x$10,3$ addi x$14,$ x$10,4$ addi x$15,$ x$10,5$