2.2 An examination paper has 4 questions. The answers to these questions do not take equal time to correct. Answer to question 1 takes 2 minutes to correct, question 2 takes 3 minutes, question 3 takes 2.5 minutes and question 4 takes 4 minutes. Due to this speed mismatch, storage should be provided between teachers (e.g., a tray where a teacher finishing early can keep the paper for the slower teacher to take it). Answer the following questions assuming 1000 papers are to be corrected by 4 teachers. (i) What is the idle time of teachers? (ii) What is the system efficiency? (iii) How much tray space should be provided between teachers due to speed mismatch? 9 3 If Rvarnica 2 2 ic to ha erthrnri ncina a data narallal rn-nroceinc, mpthnti what