Answer
a). We will see (3) multiple images caused by reflections of two mirrors.
b). 1st image from north wall is 3m behind north wall.
1 st image from south wall is 5m behind south wall.
2nd image from south wall is $3+3+5=11m$ from south wall.
2nd image from north wall is $5+5+3=13m$ behind north wall.
Work Step by Step
a). We will see (3) multiple images caused by reflections of two mirrors.
b). 1st image from north wall is 3m behind north wall.
1 st image from south wall is 5m behind south wall.
2nd image from south wall is $3+3+5=11m$ from south wall.
2nd image from north wall is $5+5+3=13m$ behind north wall.
