Using Figure $8\mathrm{.}14$ in the the text, what is the indicated HP for a fan that produces $7000$ CFM @ $4\mathrm{.}4"$ H$2$O$?$ Select the closest answer.

Question $14$ options:

$1)$

$8$ HP

$2)$

$70$ HP

$3)$

$7$ HP

$4)$

$6$ HP