8(ppm) = (i) 0.92 (3H, d, J = 7.0 Hz) 1.14 (6H, s) 1.18 (1H, dd, J = 13.3, 10.0 Hz) 1.25 (1H, dd, J = 13.3, 2.1 Hz) 1.54 (1H, m) 2.00 (1H, ddd, J = 13.5, 11.3, 10.0 Hz) 2.33 (1H, ddd, J = 13.5, 6.6, 3.9 Hz) 2.35 (3H, s) 5.97 (1H, dd, J = 11.3, 6.6 Hz) 6.01 (1H, d, J= 15.7 Hz) 7.24 (1H, d, J = 15.7 Hz) Assign all of the peaks listed for the H NMR spectrum. Give reasons for your assignments.