When Bessie asked Harry, "Are you truly Harry Hagberd?" he was taken aback. ‘Can you back it up?' Yes, I can prove that, Harry said confidently. Harry smeared a fake beard on his chin and asked Bessie, "Do I look like him or not?" 'It's true,' Bessie said mumbling. After that, he told Bessel every detail that proved he is just Harry, such as how Mother chastised me for being idle, and the old man threatened to tear my soul out of my body rather than let me go to sea. Well, it seems that he would as well. Bessie was persuaded by Harry's memorybased information that the young man was definitely Harry.

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?