Tomtom Co$.$ issued a $10-$year bond, with a coupon of $5\%,$ making semiannual payments and a par value of $$1,000.$ The bond currently sells for $103\%$ of par. The company's tax rate is $21\%.$

a$.)$ Calculate the before$-$tax cost of debt. $($Enter percentages as decimals and round to $4$ decimals$)$

b$.)$ Calculate the after$-$tax cost of debt. $($Enter percentages as decimals and round to $4$ decimals$)$