Generating employment in the formal sector is essential for the following reasons:
Job Security: Formal sector jobs provide job security, fixed wages, and social benefits like pensions and insurance.
Tax Revenue: Formal employment increases the taxable base, contributing to government revenue for development projects.
Skill Development: The formal sector focuses on training and skill enhancement, increasing workforce productivity.
Economic Stability: Stable employment in the formal sector reduces income disparities and ensures steady economic growth.
The following data represents the income of a country for a year: 
Calculate the National Income (NI) of the country.
The following data shows the number of students in different streams in a school: 
Which type of graph is best suited to represent this data?

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?