The following instruction is being executed on an ARM microprocessor with pipelined microarchitecture. Explain in detail the problems that may arise and how they can be resolved.

OR R$3,$ R$4,$ R$5$

AND R$4,$ R$1,$ R$2$

SUB R$3,$ R$3,$ #$1$

STR $[$R$4,1],$ R$3$