2. (a). Three forces that act on a particle are given by F1 = (20 i – 36 j + 73 k) N, F2 = (-17 i + 21 j – 46 k) N, and F3 = (-12 k) N. Find their resultant vector. Also find the magnitude

of the resultant to two significant figures.

(b). A vector has an x- component of -25.0 units and a y- component of 40.0 units. Find

the magnitude and direction of the vector.​