A training program for a running race prescribes the following plan: run 5 km in the first week increase the distance run by 0.4 km per week complete training program lasts 16 weeks. Find a formula for the distance an run in the nth week. D (b) (i) How far does the athlete run in the last week of the training program? (ii) How far has the athlete run in total at the end of the training program? [2 marks] [2 marks] [3 marks] (iii) The athlete continues running at the same rate after the program finishes, and continues to record the total distance. In which week will the total mileage exceed 200 km for the first time? [4 marks]