(a) Image of the object placed at A is formed behind the mirror.
The distance of the image from the mirror is equal to the distance of object from the mirror. Image of A is shown in the given figure.
(b) Yes, Paheli can see the image of A.
(c) Yes, Boojho can see the image of A.
(d) When Paheli moves from B to C, the image of the object at A will not move as the object is not moving.