Ethane may catalytically cracked to ethylene and hydrogen; C2H6 C2H4 + H2 However, it also may react with hydrogen in a side reaction to yield methane. C2H6 + H2 2CH4 The feed gas to the reactor contains both ethane and hydrogen, and the product stream analysis shows 35% ethane, 30% ethylene, 28% hydrogen, and 7% methane. a) Determine the excess reactant and calculate % excess reactant. b) Determine the conversion of ethane.