Measure with Paper Strips

Aman, Sahir, and Leena are trying to measure the length of a sheet of paper using measuring strips of paper of different lengths (shown below). One of them uses  green, other uses yellow, and the last person uses blue measuring-strips to measure the length of the same sheet of paper.

   

Aman found the length as 7 units.
Leena found the length as 11 units.
Sahir found the lengths as 5 units.
 

 

Given these conditions, predict:
Who used the green strips?
Who used the pink strips?
Who used the brown strips?

(Write in your notebook)