Salaam,
Please note that in Question 2 of Assignment 2, the goal is to find an FPTAS for the problem stated. (The FPTAS requirement was missed in the first version of the assignment posted on the website.)
By the way, the due date for this assignment is extended (as agreed in the class) to 12 Ordibehesht at 4:30pm.
Regards,
Zarrabi-Zadeh