The woman Dr Margolin encountered at the wedding was his one true love, Raizel, the daughter of Melekh, the watchman. He loved her so much that he wanted to marry her, but he had no luck and couldn’t marry her. The last time Dr Margolin heard of her was that she had married someone else and had children, who the Nazis later killed.

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?