Having more than 1,000 students in a year, assume that I choose a simple random samples of 30 final exams in my engineering economics class and compute the class average. The results show that 5% of the grades are over 2.1 and 5% are under 1.9. Using this information, determine (i) the population mean and (ii) the population standard deviation of the final exam. To have a full mark, you NEED to show your calculation and solution (with all the STEPS) in the midterm exam file posted under Assessment-Assignment ( Similar to Weekly Quizzes). Do NOT use EXCEL O a) (1) 4 (ii) 0.43 O b) (1) 2 (ii) 0.33 O c) None of the answers are correct O d) (1) 6 (ii) 0.13 O e) (i) 3 (ii) 0.53