Problem 4-12 - Vector components

A car is travelling along a winding highway at a constant speed of $82\; km/h.$ At 3:00 p.m., the car is heading $38.2^\circ$ east of north, and at 3:15 p.m. it is heading $12.7^\circ$ south of east. Define the $+x$ and $+y$ directions to be east and north, respectively. Use Eq. 4-8 to determine the $x$- and $y$-components of the average acceleration during this time interval. 

We will work in standard units i.e., $m$ and $s$ so $82\; km/hr$ is:

(A)   $22.8\; m/s$

(B)   $295\; m/s$

(C)   $82\; m/s$