Based on the mass spectrum below, propose the structures of fragments corresponding to peaks of m/e = 43, 58, 113, 128.

sorry image quality is bad but the second carbon has a double bond to an O.

3. Based on the mass spectrum below, propose the structures of fragments corresponding to the peaks of m/e = 43, 58, 113, 128, respectively (8%) 100 and-chonanon M.W.-120 Alundance 113 1122 2 30 x 40 450 45 00 75 100 105 110 120 125 150