I need help with option C, please.

(5%) Problem 2: While sliding a couch across a floor, Hannah and Andrea exert forces Fy and FA on the couch. Hannah's force is due north with a magnitude of FH = 125 N and Andrea's force is 0 = 280 east of north with a magnitude of FA = 21/ N. In this problem, use a coordinate system with positive y directed north and positive x directed east. * 25% Part (a) Find the net force in the y-direction in newtons. E Fy = 410.360 Grade Summary N Deductions 0% Potential 100% sin( cos( tan() 7 8 9 HOME Submissions cotan() asin acos() 4 5 6 Attempts remaining: 5 (0% per attempt atan( acotan( sinh( ) 1 2 3 detailed view coshO) tanh() cotanh() + END 0% Degrees O Radians BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 4 25% Part (b) Find the net force in the x-direction in newtons. A 25% Part (c) Calculate the angle in degrees north of east of the net force exerted on the couch by Hannah and Andrea, FHA- & 25% Part (d) Hannah and Andrea's housemates, David and Stephanie, disagree with the move and want to prevent the relocation. Their combined force Fos must be equal and opposite to that of FHA. What is the magnitude in newtons of the force Fps that will prevent the relocation