boat is drifting down a river $($in the $+$x direction$)$ with a current of $2\mathrm{.}1$ m$/$s$,$ while the wind $($v $=5\mathrm{.}2$ m$/$s$)$

is hitting against the boat at an angle of $15.$ What is the total velocity of the boat $($include direction$)?$ What

would it be if the wind were at the same angle, but coming from behind the boat