Solved by a verified expert:1. Draw fully deprotonated 2,3 diphosphoglycerate (DPG).2. Convert glyceraldehyde to glyceraldehyde phosphate (GAP), also called glyceraldehyde-3-phosphate (G3P). Draw the fully protonated form.3. Convert dihydroxyacetone to fully protonated dihydroxyacetone phosphate (DHAP).4. In the enzyme catalyzed reaction that converts DHAP to GAP, there is an ene-diol intermediate bound to the enzyme. Convert DHAP to that intermediate. Draw the fully protonated form.