Based on the energy differences for the various conformations of ethane, propane, and butane in Figures 2-10, 2-11, and 2-13, determine the following:
(a) The energy associated with a single hydrogen-hydrogen eclipsing interaction
(b) The energy associated with a single methyl-hydrogen eclipsing interaction
(c) The energy associated with a single methyl-methyl eclipsing interaction
(d) The energy associated with a single methyl-methyl gauche interaction