Student IQ scores collected from a school are approximately normally distributed with a mean of 100 and a standard deviation of 7. Use the 68 95 99.7 rule to answer the following questions. Part 1. a) What proportion of the student IQ scores are between 79 and 121? Number % (Enter the exact value as a percentage according to the 68-95-99] rule] b) What range contains the central 95% of IQ scores? [ Number , Number ] (Enter the exact value according to the 68-95-99. 7 rule)_ Part 2. Will has an IQ of 107. c) How many standard deviations above the mean is Will's IQ? Number (Enter the exact value according to the 68-95-99. 7 rule) d) Hence, what proportion of students in the school have an IQ lower than Will's IQ? Number % (Enter the exact value as a percentage according to the 68-95-99] rule)