A pharmaceutical firm before regularizing its services by medical representatives conducts a test about the product knowledge. The following data give the test score and the sales made by ten representatives during the training period Test 34 score sales 61 Required; i. 39 44 41 66 78 67 48 80 42 75 35 63 40 39 45 71 69 76 Calculate the coefficient of correlation between the test score [6 marks] [4 marks] [2 marks] and sales. ii. Determine the regression of test score on sales. Determine the sales for a test score of 50. iii. b) A card is drawn from a well-shuffled pack of playing cards. probability that the card drawn is either a club or a king. Find the [3 marks]