A digital computer has a memory unit with a capacity of $16,384$ words, $40$

bits per word. The instruction code format consists of six bits for the operation part and $14$ bits for the address part $($no indirect mode bit$).$ Two

instructions are packed in one memory word, and a $40-$bit instruction register IR is available in the control unit. Formulate a procedure for fetching and

executing instructions for this computer.