An object moves with 5 m/s towards right while mirror moves with 1 m/s towards the left as shown. Find velocity of image.

Question

 

$(a)\;5\;m/s\;towards \;right \\ (b)\;7\;m/s\;towards \;left \\ (c)\;7\;m/s\;towards \;right \\ (d)\;5\;m/s\;towards \;left$