Final answer:
Increasing warranty estimate percentage, keep estimate percentages low to decrease net income, and increasing warranty estimate percentages to lower taxes.
Step-by-step explanation:
For question 2, we would suggest Arctica to increase its warranty estimate percentage in future periods. Increasing the estimate percentage would reflect a more accurate estimation of warranty liabilities, potentially avoiding underestimation and unexpected costs.
For question 3, management might want to keep these percentages low because it would decrease net income and show a 'smooth' earnings pattern. This could be beneficial for various reasons such as maintaining investor confidence or achieving certain financial goals.
For question 4, to lower Arctica's taxes, management might try to increase warranty estimate percentages. By increasing the estimate percentages, Arctica's net income would decrease, resulting in lower taxable income and potentially reducing the tax liability.