answer both parts please

(8%) Problem 7: Two children pull a third child backwards on a snow-saucer sled exerting forces F1 = 12.5 Nand F2 = 8.5 N, as shown in the figure. Note that the direction of the friction force, f = 5.4 N, is unspecified; it will be opposite in direction to the sum of the other two forces. Forbes, David - david.forbes@doane.edu 30 Free-body diagram F. Fz Otheexpertta.com @theexpertta.com - tracking id: 9N69-72-B9-45-AB7A-35259. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. 4 50% Part (a) Find the magnitude, in meters per squared second, of the acceleration of the 49 kg sled and child system. Grade Summary m/$2 Deductions 0% Potential 100% Late Work % 100% sin cos tan( 7 8 9 HOME Late Potential 100% cotan( asin( acos() E 4 5 6 Submissions atan() acotan( sinh() 2 3 Attempts remaining: 1 coshO tanh() cotanh() + END (50% per attempt) detailed view Degrees O Radians VO BACKSPACE CLEAR Submit Hint Feedback I give up! Hints:10% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 4 50% Part (b) Let east be towards the right of the sketch, and let north be towards the top of the sketch. Assuming the sled starts at rest, find the direction of the velocity in degrees north of east