$($standard deviation$)$ of a partfolio that consists of an equal investment in:

a$,31$ firms of type $5?$

b$.31$ firms of type I?

a$.$ What is the volatility $($standard deviation$)$ of a portfolio that consists of an equal investment in $31$ firms of type S$?$

Standard deviation is $|\%|.($Round to tho decimal places.$)$

b$.$ What is the volatifity $($standard deviation$)$ of a portfolio thot consists of an equal investment in $31$ firms of type $1?$

Standard deviation is $,|\%|.($Round to two decimal places.$)$