(7%) Problem 13: The force required to compress a non-standard spring varies as the spring is compressed, as shown by the plot of force vs displacement in the figure. The distances in the figure are x1 = 15 cm, x2 - 35 cm, x3 = $5 cm, and x4 - 85 cm, and the forces are F1 = 150 N and F2 = -45 N. X3 X4 O X X NT ance with Expert TA's Terms of Service copying bing so may result in termination of your Expert TA D 4 25% Part (a) Write an equation, in terms of the variables in the problem statement, for the amount of work required to compress the spring from the origin to x 4- Grade Summary WO-+4 = Deductions Potential 100 Submissions 18 Attempts remaining: F1 F2 (0% per attempt) m 3 detailed view XI + *2 X3 XA VC Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback 4 25% Part (b) Calculate the work done, in joules, on the spring as it is compressed from the origin to point .x4. 4 25% Part (c) Write an equation, in terms of the variables in the problem statement, for the amount of work required to compress the spring from x to 4 25% Part (d) Calculate the work done, in joules, on the spring it is compressed from the point .x, to the point x3