Analyzing Intangible Assets

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

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

$\backslash$table$[[$June $30,\backslash$table$[[$Gross Carrying$],[$Amount$]],\backslash$table$[[$Accumulated$],[$Amortization$]],\backslash$table$[[$Average Useful$],[$Life$]]],[$Technology$-$based,$$11,277,$$ $(6,958),4$ years$],[$Customer$-$related.,$7,342,(3,171),4$ years$],[$Marketing$-$related $.,4,942,(2,143),6$ years$],[$Contract$-$based.,$16,(7),3$ years$],[$Total$.,$$$23,577,$$$(12,279),]]$

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

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