A group of 40 students in a library was sampled and the type of laptop they were using was examined. It was found that 18 were using HP, 10 were using Lenovo, 6 were using Dell, 3 were using Microsoft, and 3 were using Apple.
a. Use the given information to complete the following table:
Laptop Type HP Lenovo Dell Microsoft Apple Frequency 18 10 6 3 3
Relative 0 0 0 0 0
Frequency

b. How many degrees will the segment representing "Lenovo" have on a pie chart?
c. What proportion of the students use HP?
d. What is the relative frequency for Apple?