solve a,b,c,d

The quarterly returns for a group of 78 mutual funds with a mean of 2.3% and a standard deviation of 6.6% can be modeled by a Normal model. Based on the model N(0.023,0.066), what are the cutoff values for the a) highest 30% of these funds? b) lowest 20%? c) middle 80%? d) highest 80%? a) Select the correct choice and fill in any answer boxes in your choice below. (Round to two decimal places as needed.) O A. x % O C. %