Dr Margolin realised that something was wrong when he noticed that his wallet was missing from his shirt pocket and he was not sure how and where he had lost his wallet. He also couldn’t understand that his true love, Raizel, being present at the wedding, looked too young, and he was in a dilemma that she might be her daughter, who was trying to mock him. All these events led Dr Margolin to a confused state of mind.

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?