Write the expected products of the reaction of each of the following sugars with 

(i) Br₂, H₂O;

 (ii) HNO₃, H₂O, 60°C; 

(iii) NaBH₄, CH₃OH; and 

(iv) excess C₆H₅NHNH₂, CH₃CH₂OH, Δ. 

Find the common names of all the products. 

(a) D-(-)-Threose; 

(b) D-(+)-xylose; 

(c) D-(+)- galactose.