Answer:
Explanation:
The journal entries are shown below:
A. Cash A/c Dr $15,000
    To Service revenue A/c $15,000
(Being cash is received)
B. Cash A/c Dr $150
    To Unearned Service revenue A/c $150
(Being unearned service revenue recorded)
C. Cash A/c Dr $4,000
   To Accounts Receivable $4,000
(Being cash received for service provided)
D. Cash A/c Dr $2,250
    To Unearned Service revenue A/c $2,250
(Being advance payment is received)
E. Accounts receivable A/c Dr $125
    To Service revenue A/c         $125
(Being service provided is recorded)