Read the following passage and solve the questions based on it.
Six persons Amar, Bijay, Chetan, Disha, Esha and Farukh took up a job with an organization in a week from Monday to Saturday. Each of them joined for different posts on different days. The posts were of—clerk, officer, technician, manager, supervisor and sales executive, though not necessarily in the same order.
Farukh joined as a manager on the first day. Bijay joined as a supervisor but neither on Wednesday nor Friday. Disha joined as a technician on Thursday. Chetan joined the firm as an officer on Wednesday. Esha joined as a clerk on Tuesday. Amar joined as a sales executive.
Who was the last person to join the firm?