Given these LEGv$8$ machine instructions, indicate what each value represents.

Table of machine language instructions. This table has $5$ columns, labeled opcode, Rm$/$address$,$ shamt$/$op$2,$ Rn$,$ and Rd$/$Rt$.$ The first row has the opcode as $1986,$ Rm$/$address as $240,$ shamt$/$op$2$ as $0,$ Rn as $10,$ and Rd$/$Rt as $9.$ The second row has the opcode as $1112,$ Rm$/$address as $9,$ shamt$/$op$2$ as $0,$ Rn as $21$ and Rd$/$Rt as $9.$ The third row has the opcode as $580,$ Rm$/$address as $1,$ shamt$/$op$2$ as $1,$ Rn as $9,$ and Rd$/$Rt as $9.$ The fourth row has the opcode as $1984,$ Rm$/$address as $240,$ shamt$/$op$2$ as $0,$ Rn as $10,$ and Rd$/$Rt as $9.$