A person with any physical impairment can live life with respect and honour, if he is not ridiculed and punished with heartless pity. He expects empathy rather than sympathy. If everyone looks down at him with a pessimistic approach, he may never be able to come out of his sorrow, and consequently, would recline to his own secluded world. He is already in tremendous mental and emotional pressure. So, he expects others to be understanding rather than remind him of his disability.
In the play, Derry and Mr. Lamb, both are caught in a similar situation. Mr. Lamb, as an adult, is able to cope with such problems, but Derry, being a child, is not able to untangle this web alone. He develops a strong liking for this old man because he spoke the words to a person who was suffering from the same ignominy.The old man thought the boy would wish to hear him.

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?