Draw the Fischer projections for the open-chain structures of D-glucose and L-glucose?

The fischer projection of D-fructose is given below, write the fischer projection of L-fructose.

Write the reaction of D-glucose with ${\mathrm{HNO}}_3$.

Give reasons as the evidence in support of cyclic structure of glucose

Simple six membered ring compounds (eg. Cyclohexane) are not soluble in water, whereas glucose and sucrose are soluble in water. Explain why?