Can someone explain how they got their answers and why it's correct?

Preparing Adjusting Journal Entries Baker Corp., which produces fine confections, had the following transactions during 2020 1. Jan. 1 Purchased insurance policy for $12,000 cash that expires on December 31, 2021 2. Mar. 31 Borrowed $75,000 cash from a bank and signed a one year nate payable, with interest of due at maturity. 3. June 30 Purchased equipment for $50,000 cash. The equipment will be depreciated evenly over ten years 4. Dec. 1 A key customer borrows $15,000 cash and signs a 1-year note that requires the customer to pay the loan of $15,000 plus interest of 10% upon maturity S.Dec. 15 $4,500 cash collected for a performance obligation to be completed in January 2021 Hint: Credit Deferred Service Revenue when collected a. Prepare the original journal entry for each transaction on the date provided. b. Provide the 2020 adjusting journal entry (if applicable) for each situation, Note: If a journal entry isn't required for the transaction select "N/A" as the account names and leave the Dr. and Cr.answers blank (zero). Original journal entries Adjusting journal entries a. Prepare the original journal entry for each transaction on the date provided General Journal Ref. Account Name Dr. Cr. Jan 1 0 . Mar. 31 D 0 D D o June 30 . 0 0 Dec 1 OOOO + 0 Dec. 15 0 D Check Baker Corp., which produces fine confections, had the following transactions during 2020. 1. Jan. 1 Purchased insurance policy for $12,000 cash that expires on December 31, 2021. 2. Mar. 31 Borrowed $75,000 cash from a bank and signed a one-year note payable, with interest of 65 due at maturity. 8. June 30 Purchased equipment for $50,000 cash. The equipment will be depreciated evenly over ten years 14. Dec. 1 A key customer borrows $15,000 cash and signs a 1-year note that requires the customer to pay the loan of $15.000 plus interest of 109 upon maturity 5. Dec. 15 $4,500 cash collected for a performance obligation to be completed in January 2021 Hint: Credit Deferred Service Revenue when collected. a. Prepare the original journal entry for each transaction on the date provided b. Provide the 2020 adjusting journal entry (if applicable) for each situation. Note: If a journal entry isn't required for the transaction, select "N/A" as the account names and leave the Dr. and Cr.answers blank (zero). Original journal entries Adjusting journal entries (if applicable) for each situation b. Provide the 2020 adjusting journal ent General Journal Ref Account Name . Dec 31 (1) Dr. Cr. 0 D a D 0 Dec 3123 0 0 a Dec 31 (31 D 0 . 0 Dec. 31(4 0 D a 0 Dec 31 (5) 0 0 a D Check