(a) Show that D-glucose, D-mannose, and D-fructose all give the same osazone. Show the structure and stereochemistry...

Question:

(a) Show that D-glucose, D-mannose, and D-fructose all give the same osazone. Show the structure and stereochemistry of this osazone.
(b) D-Talose is an aldohexose that gives the same osazone as D-galactose. Give the structure of D-talose, and give the structure of its osazone.