Four masses (m= 500g) are at the corners of a very thin rigid sheet (ignore the mass of the sheet), with sides L= 25.0 cm. F1= 2.50 N, F2= 4.25 N. (a) Find the angular acceleration about the center O If F1 is the only force being applied.(b) Find the angular acceleration about the center O for F2is the only force being applied.(c) Find the angular acceleration about the center O if both forces are applied at the same time.