A - Sign - 13. A randomized clinical trial tests whether scheduled exercise can prevent the development of diabetes among those with family history of diabetes. Participants are randomized to receive either a scheduled exercise program or no such treatment. After 12 months the results were as follows: Diabetes No Diabetes Totals Scheduled 1286 442 exercise program -286 stuck to the program -400 stuck to the program -1000 stopped the program -42 stopped the program 1728 No intervention 144 334 478 a. What is the efficacy of this intervention using an intent to treat analysis? (7 points) 1 286 x 334 + 442x144 = 429 524: 63648 6 . 74 7 b. What is the efficacy of this intervention using a per protocol analysis? (7 points)