I need help on these true/false questions and if it's false why? Thank you!

16) The value of a bond with semannual interest is greater than a bond with annual interest, everything else the same. 17) Increases in the basic cost of long-term funds or in the risk will raise the required return on the bond. 18) Yield to maturity (YTM) is the rate investors earn if they buy the bond at a specific price and hold it until maturity 19) The yield to maturity on a bond with a current price equal tits par, or face value will always be equal to the coupon interest rate. 20) A bond with short maturity has less "interest rate risk" than a bond with long maturity when all other features-coupon interest rate, par value, and interest payment frequency are the same