Answer:
(a) Under Accrual basis of accounting
No journal entry is required
(b) Under Cash basis of accounting
Salaries/Wages expense A/C Dr. $1600
To Cash A/C $1600
(Being salaries, wages paid in cash)
The cash basis of accounting records transactions on receipts/payments basis and when cash is actually paid or received.
Accrual basis of accounting records transactions as and when they arise or incomes are "earned" irrespective of the fact whether actual payment has been made or received.