6. Scores on an Intelligence test for 21 to 34 age group are approximately normally distributed with mean 120 and standard deviation 15. Must show z formula and z-table values wherever necessary to get credit. i) Find the percent of values below 139. ii) Find the percent of values above 1 10. iii) Find the 25th percentile IQ. iv) Find 60th percentile IQ. V) Find the cut off score to be in the top 20%