Please help with a&b. Excel format

Karsted Air Services is now in the final year of a project. The equipment originally cost $30 million, of which 70% has been depreciated. Karsted can sell the used equipment today for $10 million, and its tax rate is 40%. a. What is the equipment's after-tax salvage value? b. If the used equipment can be sold today for $8 million, Lwhat in the equipment's after-tax net salvage value