For each of the following transactions for the SkyBlue Corporation, give the accounting equation effects of the adjustments required at the end of the month on December 31, 2017: 

a. Received a $600 utility bill for electricity usage in December to be paid in January 2018. 

b. Owed wages to ten employees who worked three days at $100 each per day at the end of December. The company will pay employees at the end of the first week of January 2018. 

c. On December 1, 2017, loaned money to an employee who agreed to repay the loan in one year along with $1,200 for one full year of interest. No interest has been recorded yet. 

Using the information, prepare the adjusting journal entries required on December 31, 2017.