In a recent $10-$K$,$ Microsoft reported the following details about its intangible assets.

The components of intangible assets, all of which are finite$-$lived, were as follows $($in millions$)$:

June $30$Gross Carrying AmountAccumulated AmortizationAverage Useful LifeTechnology$-$based$$11,277$$$(6,958)4$ yearsCustomer$-$related$7,342(3,171)4$ yearsMarketing$-$related$4,942(2,143)6$ yearsContract$-$based$16(7)3$ yearsTotal$$23,577$$$(12,279)$

a$.$ Calculate the percent used up for each type of intangible asset.

Note: Round answers to the nearest dollar, if applicable.

$($in Millions$)$NumeratorDenominator$\%$ Used UpAnswer $1$Accumulated AmortizationAverage Useful LifeDepreciation ExpenseGross Carrying AmountNet Carrying AmountAnswer $2$Accumulated AmortizationAverage Useful LifeDepreciation ExpenseGross Carrying AmountNet Carrying AmountTechnology$-$basedAnswer $3$Answer $4$Customer$-$relatedAnswer $5$Answer $6$Marketing$-$relatedAnswer $7$Answer $8$Contract$-$basedAnswer $9$Answer $10$

b$.$ Estimate depreciation expense for the current fiscal year.

Note: Round answers to the nearest dollar, if applicable.

Depreciation ExpenseTechnology$-$basedAnswer $11$Customer$-$relatedAnswer $12$Marketing$-$relatedAnswer $13$Contract$-$basedAnswer $14$Total