Hii can you help me with these questions please because I know the answers but I don't know how to do them

19. (Very Challenging) A man drags a 100 kg crate up the ramp of a truck. The ramp is inclined at 20 and the man pulls at an angle of 30 above the ramp, The coefcient of friction between the crate and the ramp is 0.2. a) What is the normal force on the crate in terms of the applied force, F? (Hint: The normal force does not just balance the perpendicular component of gravity) b) What is the minimum force the man would have to apply to pull the crate up the ramp (Hint: minimum force would be the force required to pull the crate up the ramp at constant velocity) \f