Boosting public investment will have the following impacts:
Income: Increased investment leads to higher aggregate demand, generating income for contractors, suppliers, and workers involved in the project.
Employment: Public investments create direct and indirect employment opportunities, reducing unemployment.
Output: The multiplier effect ensures that the initial investment leads to multiple rounds of increased production and services in the economy. Thus, public investments have a positive impact on income, employment, and output, promoting economic growth.

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?