I need help solving this one because I don't understand it but how is this one different than calculating the regular yield to maturity? Essentially, my question is how to calculator yield to maturity when there are varying percentages over the years?

Consider a five-year, default-free bond with annual coupons of 7% and a face value of $1,000 and assume zero-coupon yields on default-free securities are as summarized in the following table:

Maturity	1 year	2 years	3 years	4 years	5 years
Zero-Coupon Yields	6.00%	6.30%	6.50%	6.70%	6.80%