Suppose that a $1091$ Hz tuning fork moves at $14\mathrm{.}0$ m$/$s through air and water.

$($a$)$ Find the observed frequency of the sound at a point directly in front of the source through air. $($The speed of sound in air is $344$ m$/$s$.)$

$($b$)$ Find the observed frequency of the sound at a point directly in front of the source through water? $($The speed of sound in water is $1480$ m$/$s$.)$