Answer these following questions.

Question # 8: The scores for by eight students in the courses Quantitative Methods and Finance are as follows: Quantitative Finance Methods 70 60 46 66 94 90 34 46 20 16 86 98 18 24 56 8 Compute the student's ranks in the two subjects and compute the Spearman rank correlation coefficient and comment on its value.Question # 6: A trading company expects to sell 15,000 mixers during the coming year. The cost of storing a mixer for is SR 2 per month and the ordering cost is SR 540 per order. a) Find the Economic Order Quantity. b) Calculate the total stock cost. 0) How much will EOQ be changed if there is 10% increase in the price of a mixer? Question # 5: The demand equation of a good is given by P + 2x = 20 and the total cost function is 8+ 20x + 2 (a) Find the level of output that maximizes total revenue. (b) Find the maximum prot and the value of x at which it is achieved