The collateral for a floater-and-inverse structure is a fixed-rate bond with a 4% coupon, the floater coupon rate is the reference rate plus 1.8%, and the ratio of the floater par to the inverse par is 1. What is the cap on the floater, in %, to the nearest 0.01%? (Do NOT use the % symbol when recording your answer.) Assume the floor coupon rate on the inverse floater is 0%.