Use the given points to answer the following questions. P(7, 3, 7), Q(-9, -2, 3), R(0, 5, 9) (a) Which of the points is closest to the xz-plane? OP O Q OR (b) Which point lies in the yz-plane? OP O Q ORFind each of the following. a = i + 3j - 5k b = -2i - j + 4k (a) a +b K (b) 2a + 3b + k (c) lal (d) la - blIf a child pulls a sled through the snow on a level path with a force of 30 N exerted at an angle of 420 above the horizontal, find the horizontal and vertical components of the force. (Round your answers to one decimal place.) horizontal 52 N vertical 47 X NA quarterback throws a football with an angle of elevation 40 and speed 60 ft/s. Find the horizontal and vertical components of the velocity vector. (Round your answers to one decimal place.) horizontal ft/s vertical ft/sFind the scalar and vector projections of b onto a. a = 2i - j + 6k, b = j + (1/2)k comp-b = projab = <