Answer and Explanation:
The journal entries are shown below;
a. Interest receivable Dr ($12,000 × 7% × 30 days ÷ 360 days) $70
To Interest revenue $70
(Being the interest revenue is recorded)
For recording this we debited the interest receivable as it increased the asset and credited the interest revenue as it also increased the revenue
b. Cash Dr $12,105
To interest receivable $70
To interest revenue ($12,000 × 7% × 15 days ÷ 360 days) $35
To Note receivable $12,000
(being cash received is recorded)
For recording this we debited the cash as it increased the assets and credited the interest receivable, interest revenue and note receivable as it decreased the asset and increased the revenue