help please

#1 apple sold $1500000 in products to walmart on account. what account is debited and what account is credited?

#2 the local doctor purchases a building for 200,000 signing a notes payable. what accounts are debit/credit?

#3 on 1/5 walmart buys 1500 worth of food from target on account. then on 2/5 walmart pays the 1500 owed to target. which accounts are debited/credited for the 2/5 transaction?

#1 first transaction date is 10/15.

second transaction date is 08/05 and the notes payable agreement is for 20 years.