$(4$ marks$)$ Consider the following grammar and the code to calculate discriminant of quadratic equation $(b^2-4ac)$:

$\backslash$table$[[$gand$,$Code$],[$f$12$de$7$bb$4-3$d$16-47$b$5-9990-$e$879$d$18$d$786$e$\}$

$\backslash$table$[[$ProgramlongrightarrowstmtJist$$$],[]]\{$f$97$e$105$fa$-25$ef$-4$fa$9-970$d$-489633$a$9$a$4$fb$,],[,]]$

$\backslash$table$[[($ Read A $)],[($ Read B $)],[($ Read C $)],[$DESC$=$B$*$B$-4*$A$*$C$],[($ Write DESC $)]](\}\backslash$

$\backslash$hline

Draw the parse tree for the code given in the table above..