Tao Ying, like her significant other, came from a low-income family and worked as a blue-collar worker. There was no surplus of money, but still, she led her life as an example for her son to follow. Her approach was gentle, and she changed how she leads her life so that her son Xiao Ye would respect her.

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?