A student used the following steps in testing for a non-sugar soon

I. Add Benedict's soln to d sugar solnII. Added D
il HCl to the sugar soln and boiled it
III. Added NaOH soln to d soln in II and boiled
IV. Added Benedict's soln to the cooled soln in
IIWhy did he add the Dil HCl to d sugar soln in step II?
What is d impotance of step II in dtesting process?In step IV y does d soln hv to be cooled?