Adjusting entries for depreciation; effect of error

On December $31,$ a business estimates depreciation on equipment used during the first year of operations to be $$13,900.$

a$.$ Journalize the adjusting entry required as of December $31$: If an amount box does not require an entry, leave it blank.

Dec. $31$

b$.$ If the adjusting entry in $($a$)$ were omitted, which items would be erroneously stated on the income statement for the year?

Depreciation Expense

Net Income

If the adjusting entry in $($a$)$ were omitted, which items would be erroneously stated on the balance sheit as of December $31?$

Accumulated Depreciation

Total Assets

Owner's Equity