Three elements: Boron, Silicon, Phosphorus have $3,4$ and $5$ valence electrons respectively.

Which element or combination of elements is:

$($i$)$ used as an extrinsic semiconductor?

$($ii$)$ used as an acceptor impurity?

$($iii$)$ used as a donor impurity?

$($iv$)$ used to get n$-$type semiconductor?

$($v$)$ used to get p$-$type semiconductor