Please help solve the incorrect ones.

In 2016, Natural Selection, a nationwide computer dating service, had $518 million of assets and $209 million of liabilities. Earnings before interest and taxes were $129 million, interest expense was $29 million, the tax rate was 40 percent, principal repayment requirements were $24.9 million, and annual dividends were 30 cents per share on 21 million shares outstanding.

a. Calculate the following for Natural Selection: (Round your answers to 2 decimal places.)

Liabilities-to-equity ratio	0.68selected answer correct
Times-interest-earned ratio	4.45selected answer correct
Times burden covered	1.44 Incorrect

b. What percentage decline in earnings before interest and taxes could Natural Selection have sustained before failing to cover: (Round your answers to 1 decimal place.)

Interest payment requirements?	(77.5) selected answer incorrect
Principal and interest requirements?	43.7 selected answer incorrect
Principal, interest, and common dividend payments?	40.0 selected answer incorrect