Complete the following code "runMathOper" which takes an input $($character: $+,-,*,/)$ and runs the appropriate routine. $($Assume that we already defined the functions "AddNumb", "SubNumb", and "MultNumb", etc. Hence, you don't need to worry about those functions.$)$

Unfortunately, we have some bugs in "runMathOper" function $($procedure$).$ Please complete the code.

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$.$data OperTable: $.$word AddNumb # Each entry in the table consists of the ASCII math operator $.$word SubNumb # followed by the address $($label$)$ of the function to branch to $.$word MulNumb $.$word DivNumb $.$text Main: jal runMathOper # End of Main runMathOper: lb $t$1,0($$a$0)$ # Input: Math Operation $(+,-,*,/)$ # $($It$$s not necessary to perform any error checking$)$ sub $t$1,$ $t$1,43$ # Adjust ASCII to perform operation la $t$0,$ OperTable # Returns $($using $32-$bit instruction$)$ the appropriate routine # address using $t$0$ to get the base address sll $t$1,$ $t$1,2$ # Shift left by $2($multiply by $4$ to get word offset$)[$Missing Instruction Here$]$ jr $t$0$

$($We have a MISSING INSTRUCTION here. Provide your answer in the following space to complete the code.$)$