A force of 28 pounds acts on the pipe wrench shown in the figure below. 18 in. 30 (a) Find the magnitude of the moment about O by evaluating ||OA x F||. (0 0 180) Use a graphing utility to graph the resulting function of 8. y 100- 80 60 40 20 y 300 250 200 150 100 x 50 100 150 x 50 100 150 y 100 80 60 40 20 y 160 140 120 100 80 60 40 x 50 100 150 x 50 100 150 (b)..Use.the.result of part (a) to determine the magnitude of the moment when = 45. (Round your answer to two decimal places.) Enter a number. (c) Use the result of part (a) to determine the angle when the magnitude of the moment is maximum. 90