The lady travelled from Naples along with Neruda and his wife on the same ship, but they had not seen each other on board. They invited her to have coffee at their table, and the author urged her to talk about her fantasies to surprise the poet. Pablo Neruda paid no attention, for he had announced that he did not believe in prophetic dreams from the very beginning. 'Only poetry is clairvoyant,' he said.

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?