Define r and s as scalars r 1.6 x 103 and s-14.2. and t, x, and y as vectors t1,2, 3, 4, 5],x [2, 4, 6, 8, 10], and y [3, 6, 9, 12, 15]. Then use these variables to calculate the following expressions using element-by-element calculations for the vectors (a) G = xt + 2-x)t (b) R = - 15