1) 3.65 kg
2) The force of friction is 4.5 N for the smaller mass and 59.2 N for the larger mass.
3) a = 18.04 m/s^2, FN= -3.7 N (The reason the force is negative is because I made the mass of the box too small by accident. If you got this value, you have done the problem correctly.)
4) a = 7.71 m/s^2, x = 47.28 m, FN = 478.02 N
5) FT = 32.07 N, a = 0.89 m/s^2 Mass A accelerates upward, mass B accelerates down the ramp.