Answer:
Date of assets placed in service is used as starting date for depreciation calculation. The office property is ready to use on August 4, 2020
The building is a non-residential property, so MACRS table for the type of property will be used
Depreciation Base $3,600,000
Cost recovery rate per table 0.963%
Cost recovery deduction for 2020 $34,668
Depreciation Base $3,600,000
Cost recovery rate per table 2.564%
Cost recovery deduction for 2020 $49,998