The Hippocratic Oath is an oath usually taken by a doctor to swear their commitment to their profession. Dr Margolin had never broken the promise, and he had always been honourable to the utmost, avoiding every kind of bias towards his patients. The protagonist, Dr Margolin, being a doctor himself, had his set of principles to follow.

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?