please help

1. What is a DST? How would the calculation of a corporation's tax obligation under a DST tax system differ from the calculation of a C corporation's tax obligation under the current US corporate income tax system? 2. Historically, foreign tax systems have asserted nexus with respect to (the right to tax) a US-headquartered MNCS income based on the existence of property and/or employees of the US-headquartered MNC in the foreign country. Why do many foreign countries belleve this historic system of taxation no longer works in the digital economy? 3. If a US-headquartered MNC would owe DST in a country in which it operates, would the foreign DST taxes paid be creditable on the corporation's US federal income tax return under the current US foreign tax credit system? Why or why not? 4. Based on your review of the Forbes article, do you think DSTs are fair when applied to US-headquartered MNCs? Please explain your