You observe the yields of the following Treasury securities (all yields are shown on a bond-equivalent basis): The security maturing in 1.5 years is selling at par and pays coupons every six-month. The 0.5 and 1.0 -year securities are zero-coupon instruments. All Face values are equal to 1,000. What is the missing spot rate on a bond equivalent basis (to the closest second decimal place)? Select one: a. The missing annual spot rate is in between 6.90% and 6.92%. b. The missing annual spot rate is in between 3.33% and 3.35%. c. The missing annual spot rate is in between 6.61% and 6.63%. d. None of the other answers given. e. The missing annual spot rate is in between 6.32% and 6.34%