There are two forces on the 1.48 kg box in the overhead view of the figure but only one is shown. For F = 14.1 N, a = 14.9 m/s2, and 0 = 27.4, find the second force (a) in unit-vector notation and as (b) a magnitude and (c) a direction. (State the direction as a negative angle measured from the +x direction.)