$2.$ For this question, consider the following two figures. The first is a table that indicates the control line selections required to implement each instruction. The second figure is a diagram of a MIPS single$-$cycle datapath.

a$)$ For the addiu instruction shown in the table, indicate the setting required for each control line. If a setting does not matter, indicate this with an X$.$ This question should not require any modifications to the datapath.

b$)$For the jal instruction shown in the table, indicate the setting required for each control line and modify the datapath in the diagram where necessar. This includes adding or changing control lines if you so choose. If a setting does not matter, indicate this with an X in the table.