I need help with the following please:

1. Adjusting entries for transactions A and B

2. If ABC did not do either of the adjusting entries associated with Transactions A and B (from the above information) on December 31, 2015, determine the cumulative effect of all errors on assets, liabilities and equity at December 31, 2015.

3. On May 1, 2015, ABC Inc. received an advance payment from a tenant in the amount of $408,000 that represented four years of rent. When ABC received the cash payment, the entry was recorded with a credit to a nominal account. ABC's year end is December 31. Sadly, ABC was understaffed at the time and no adjusting entries were made in 2015, 2016, or 2017. How did this error affect 2016 and 2017 financial statements?

You've been hired by ABC Company to review several transactions that were omitted as Adjusting Entries at December 31, 2015 as the bookkeeper was new and uncertain on how to record them. For each of the transactions listed below, record the appropriate AJE that would have been required at December 31st. Transactions A. On October 31, 2015, ABC received a $15,000 advance payment from a customer for services to be performed evenly over the next 15 months. The original entry was credited to a real account. B. On September 1, 2015, ABC paid $12,720 for a four-year insurance policy. ABC debited a nominal account at that time. For your account titles, choose from: Service Revenue Unearned Revenue Insurance Expense Prepaid Insurance