flatlands corp. and highlands inc. issued the bonds below: flatlands bond highlands bond bond rating aa bbb callable yes no convertible yes no coupon rate 4% 5% time to maturity 10 years 15 years ytm 5.8% 7.1% attempt 2/4 for 8 pts. part 1 which factors could explain the higher yield to maturity on the highlands bond? check all that apply: coupon rate callability convertibility time to maturity bond rating