For fiscal year $2017,$ Costco Wholesale Corporation $($COST$)$ had a net profit margin of $2\mathrm{.}08\%,$ asset turnover of $3\mathrm{.}55,$ and a book equity multiplier of $3\mathrm{.}37.$

a$.$ Use this data to compute Costco's ROE using the DuPont Identity

b$.$ If Costco's managers wanted to increase its ROE by $1\mathrm{.}20$ percentage points, how much higher would their new asset furnover need to be$?$

c$.$ If Costco's net profit margin fell by $1\mathrm{.}20$ percentage points, by how much would their asset turnover need to increase to maintain their ROE?

a$.$ Use this data to compute Costco's ROE using the DuPont Identity

The ROE is $\%.($Round to two decimal places.$)$

b$.$ If Costco's managers wanted to increase its ROE by $1\mathrm{.}20$ percentage points, how much higher would their new asset turnover need to be$?$

The new asset turnover is which is an increase of $($Round to two decimal places.$)$

c$.$ If Costco's net profit margin fell by $1\mathrm{.}20$ percentage points, by how much would their asset turnover need to increase to maintain their ROE?

The new asset turnover is $,$ which is an increase of $($Round to two decimal places.$)$