What effect would adding the following features have on the market price of a similar bond which does not have this feature? a. 10-year bond is callable by the company after 5 years (compare to a 10-year noncallable bond); b. bond is convertible into 10 shares of common stock at any time (compare to a nonconvertible bond); c. 10-year bond can be "put back" to the company after 3 years at par (puttable bond) (compare to a 10-year nonputtable bond); d. 25-year bond has tax-exempt coupon payments.