What does this mean

Han's Supplies's bank statement contained a $$270$ NSF check that one of its customers had written to pay for supplies purchasec

Required:

a$.$ Show the effects of recognizing the NSF check on the financial statements by recording the appropriate amounts in a horizont financial statements model. Also, in the Statement of Cash Flows column, classify the cash flows as operating activities $($OA$),$ investing activities $($IA$),$ or financing activities $($FA$).$

b$.$ Suppose the customer redeems the check by giving Han $$290$ cash in exchange for the bad check. The additional $$20$ paid a service fee charged by Han. Show the effects on the financial statements.

c$.$ Is the recognition of the NSF check on Han's books an asset source, use, or exchange transaction?

d$.$ Select which of the following is the correct answer.