Imagine that everyone in the world pays a tax of percent on interest earnings and on any

Question:

Imagine that everyone in the world pays a tax of percent on interest earnings and on any capital gains due to changes. How would such a tax alter the analysis of the interest parity condition? How does your answer change if the tax applies to interest earnings but not to capital gains, which are untaxed?

Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...