Accounts Receivable Liability Identify Each Of The Following Accounts As Asset, Liability, Stockholders Equity, Revenue Or Espense:?

Identify each of the following accounts as asset, liability, stockholders equity, revenue or espense:? - accounts receivable liability

a. Accounts Receivable
b. Costs unvested
c. Accounts Payable

** And could be very useful if I could achieve what their assets are normal?

Thanksss