Suppose that a polymer of glucose with alternating a(1 4) and (1 4) glycosidic linkages

Question:

Suppose that a polymer of glucose with alternating a(1 → 4) and β(1 → 4) glycosidic linkages has just been discovered. Draw a Haworth projection for a repeating tetramer (two repeating dimers) of such a polysaccharide. Would you expect this polymer to have primarily a structural role or an energy-storage role in organisms? What sort of organisms, if any, could use this polysaccharide as a food source?