When talking about his kid, Hagberd seemed to be optimistic that he would return home soon. She had pitifully attempted to cast doubt on that hope condemned to fail. Captain Hagberd gave her a horrific and unexpected reaction, and for a brief period, he appeared to be about to lose his mind. My youngster can't stay away from the sea, and there's nothing that can stop him from returning. His gaze began to stray. But the next day, Bessie humoured him in silence beside the fence, patiently listening.

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?