1. Suppose a density curve has an area of 0.361 to the left of 12 and an area of 0.428 to the right of 14. What is the size of the area between 12 and 147 Explain your answer. (2 marks) 2. Determine the z-scores that mark the 15" percentile and the upper 0.4%% of the standard normal distribution. (4 marks) 3. The weekly television viewing time of children aged 2 - 11 years is normally distributed with a mean of 24.50 hours and a standard deviation of 6.23 hours. a) What percentage of children watch more than 34 hours of television per week? (3 marks) b) What percentage of children watch between 10 and 20 hours of television per week? (4 marks)