Sequence the steps for calculating interest on capital when there are changes in capital (addition or withdrawal) during the year, using the period-based method shown in illustrations:
1. Calculate interest on the initial capital balance for the period it remained unchanged.
2. Calculate interest on the capital balance after withdrawal from the withdrawal date to the year-end.
3. Sum up the interest amounts calculated for all periods.
4. Calculate interest on the increased capital balance after additional capital is introduced, until any withdrawal or the year-end.