In a MIPSzy processor, what instruction bits are needed to determine an add operation? Use the figure below as a reference.

$\backslash$table$[[6$ bits,$5$ bits,$5$ bits,$16$ bits$],[000000,00000,00000,0000000000000000],[$ir$31\_26,$ir$25\_21,$ir$20\_16,,$ir$15\_0,],[6$ bits,$5$ bits,$5$ bits,$5$ bits,$5$ bits,$6$ bits$],[000000,\mathrm{.}00000,00000,00000,00000,000000]]$

ir$5\_0$

Ir$31\_26$

ir$5\_0$ AND Ir$31\_26$

Ir$5\_0$ OR Ir$31\_26$