Answer:
The Journal entries are as follows:
(a) 
(i) Account payable A/c Dr. $100,000
 To Notes payable $100,000
(To record issue notes payable)
(ii) Notes payable A/c Dr. $100,000
Interest expense A/c Dr. $875
 To cash A/c $100,875
(To record payment of notes)
Workings:
Interest expense = 100,000 × 7% × (45/360)
 = $875
(b) 
(i) Account payable A/c Dr. $100,000
 To Notes payable $100,000
(To record issue notes payable)
(ii) Notes payable A/c Dr. $100,000
Interest expense A/c Dr. $1,750
 To cash A/c $101,750
(To record payment of notes)
Workings:
Interest expense = 100,000 × 7% × (90/360)
 = $1,750