consider an economy with two types of firms S and I. S firms all moved together. I firms move independently. For both types of firms, there is a 69% probability that the firm will have a 9% return on a 31% probability that the firm will have a -12% return. What is the volatility (standard deviation) of a portfolio that consist of an equal investment in:

A) 30 firms of type S

B) 30 firms of type I

Round to 2 decimals places for both scenarios