4. Read the following carefully and answer the questions following: Ahmad, Ali, Akbar, Nasir and Shehbaz are students of a college having different heights and weights. Ahmad weighs thrice as much as Ali and Ali weighs 5 times as much as Akbar. Akbar weighs half as much as Nasir and Nasir weighs half as much as Shehbaz.

1. How many students are there in the college?

There are five students in the college: Ahmad, Ali, Akbar, Nasir and Shehbaz.

• Who is the heaviest among the students?

Ahmad is the heaviest among the students.

• Who is the tallest among the students?

The information given does not provide any information about the heights of the students. Therefore, we cannot determine who is the tallest among them.