Tao Ying didn't come from a rich family, but this does not imply that it was the only important thing in her life. After the unfortunate incident at the temple entrance, all she wanted was to gain her respect in her son's eyes. She wanted to prove to him that his mother would never do something unethical, and for that, he had to hear the truth about the misunderstanding.

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?