Help needed

Please watch the "Depreciation Expense Videos" and use it as a guidance to Find the depreciation expense for the following long term assets. Once you finish, please take a picture of your notes. - 01/10/22 - Bought Mac Book Air ($1,548) at Best Buy (4 years Residual value: $250) - 02/15/22 - Bought Microsoft Surface ($1,345) at Office Depot (4years Residual value: $220 ) - 02/20/22 - Bought Flat Bed ($7,985) from Mr. Diaz. Paid 30% Down Payment (7 years Residual Value: $2220) - 02/28/22 - Bought Anti-Virus for 3 years ($1,600) (NO RESIDUAL)