MIPS cable to make the following instructions, I are new to the MIPS related knowledge, hope to get a great god answer
Foo $rt $rs IMM

Mem [Reg [$rs]] - Reg [$rt]
[$Reg rt] - Mem [Reg] [$rs + Reg [$rt]]
Reg $rs & lt; - Reg] [$rs + IMM
PC - PC + 4