(5 marks) A carbohydrate was isolated from a sample of cow’smilk. The substance was found to have a molecular mass of 342. Theunknown carbohydrate can be hydrolyzed to form two isomericcompounds, each with a molecular mass of 180. The elementalanalysis data show that both hydrolysis products have one oxygenatom for every carbon atom. Determine a molecular formula and itsdegree of unsaturation (U) for the unknown and for the hydrolysisproducts.