13.5 A particle is in linear simple harmonic motion between two points, A and B,10cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is
(a) at the end A,
(b) at the end B ,
(c) at the mid-point of AB going towards A ,
(d) at 2 cm away from B going towards A ,
(e) at 3 cm away from A going towards B, and
(f) at 4 cm away from B going towards A.