Required information [The following information applies to the questions displayed below.] The following are transactions for the Sky Blue Corporation: a. Collected $4,200 rent for the period October 1 to December 31, which was credited to Deferred Revenue on October 1. b. Paid $2,640 for a two-year insurance premium on October 1 and debited Prepaid Insurance for that amount. c. Used a machine purchased on October 1 for $55,200. The company estimates annual depreciation of $5,520. Required: For each of the above transactions for the Sky Blue Corporation, prepare the adjusting journal entries required on Octo 31. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.)