$1$Convert the following to base $10$:

$11011001$ in base $2$

$22731$ in base $8$

$2$Add the following and explain your steps:

$$Base $16$: EF$80+8$A$19=$

$11$Subtract the following and explain your steps:

$$Base $5$: $4321021410=$

$12$Convert the following from base $10($either in the money method or division method$)$ and explain your steps:

$11126$ to base $6$

$21310$ to base $2$