Design the format for your new multiply$-$and$-$accumulate $($MAC$)$ instruction type. It might helpto look at existing instruction types above $($R$-,$ I$-,$ B$-,$ S$-,$ U$-,$ J$-)$ to get the idea of what your instructionformat might be$.$ Identify all bits and note what each field is used for. Mark each field by their bits $($forexample $[$M:N$]$ is used for xxx$).$