Identify each of the following:

(a)  Two aldoses whose configuration at carbons 3, 4, and 5 matches that of D-fructose.

(b)  The enantiomer of D-galactose.

(c)  An epimer of D-galactose that is also an epimer of D-mannose.

(d)  A ketose that has no chiral centers.

(e)  A ketose that has only one chiral center.

(f)  Monosaccharide residues of cellulose, amylose, and glycogen.

(g)  Monosaccharide residues of chitin.