reasoning. (3 pts) .) There are 3 different alkenes, A, B, and C, with the molecular formula CsHo. Each one reacts with hydrogen to ield n-pentane (CsHı2). Alkene A has IR absorption bands at 1642, 990, and 911 cm'; alkene B has IR absorption bands at 964 cml, and no absorption in the 1600-1700 cm region; and alkene C has absorptions bands at 1658 and 695 cml. Identify the three alkenes. (6 pts) Alkene A structure: Alkene B structure Alkene C structure 4.) The frequency of the O-H stretching absorption of an alcohol in solution changes as the alcohol solution is diluted. Briefly explain. (3 pts)