Instructions: For each adjustment below, indicate which category $($prepaid expense, depreciation, accrued expense, accrued revenue, or unearned revenue$)$ each fall under. Also, prepare the annual adjusting entries as of December $31.$

The equipment depreciates at a $$2,000$ per year. The equipment was purchased on Oct. $1^{st}$ of the current year.

The company has a $9$ month, $$6,000,5\%$ note payable outstanding which is dated Nov${\mathrm{.}1}^{st}$ of the current year.

The balance in the prepaid insurance account is $$4,000.$ This represents a one$-$year policy purchased on May $1^{st}$ of the current year.

Unbilled revenue at Dec. ${31}^{st}$ total $$1,200.$

The company rents out office space and requires all tenants to pay the first six months in advance at the time of rental. On Oct. $1^{st}$ of the current year, the company received $$9,000$ in advance.