(a) Positive, Positive, Positive
From the end $A$, the particle is travelling toward point 0. This motion is going from $A$ to $B$, which is the standard positive direction. As a result, the velocity, acceleration, and force measurements are all positive.
(b) Negative, Negative, Negative
From the end $A$, the particle moves toward point 0. The motion is in the traditional positive direction, from $A$ to $B$. As a result, velocity, acceleration, and force all have positive values.