PLease explain the last part thank you

Check my work mode: This shows what is correct or Incorrect for the work you have completed so far. It does not indicate completion. Return to question 1 In 2016, Natural Selection, a nationwide computer dating service, had $526 million of assets and $213 million of liabilities. Earnings before interest and taxes were $133 million, interest expense was $28.5 million, the tax rate was 40 percent, principal repayment requirements were $25.3 million, and annual dividends were 25 cents per share on 20 million shares outstanding." a. Calculate the following for Natural Selection: (Round your answers to 2 decimal places.) points Answer is complete and correct. Lieblitee-to-equity ratio Times Interest-earned ratio Times burden covered 0.68 4.67 1.88 b. What percentage decline in earnings before interest and taxes could Natural Selection have sustained before falling to cover: (Round your answers to 1 decimal place.) Interest payment requiremente? Princioal and interest recuiremente? Principal, interest, and common cividend payments? %