okay so here's the question: a. The mean time was 102.71 seconds with a standard deviation of 3.01 seconds. If the normal model is appropriate, what percent of times will be less than 99.7 seconds? b. What is the actual percent of times less than 99.7 seconds? this is an odd numbered question so the answer is in the back of my textbook but i want to know how to get it. the answer for A is about 16% and the answer for B is 5.7%. anyone know how??