$(10)$ The following is a partial list of $C$ operators:

Write an expression grammar for the above. Ensure correct precedence and

associativity. Include support for parenthesis.

$(40)$ Using your grammar for the above question, draw parse trees and syntax trees

for:

a$)x+y**(-z-x)**z+b**d$

b$)x={?}^{**}x+y^{**}(x+{?}^{**}y)+(x-y)$

c$)x=y=z=y-(x^{**}-(x+y))-z$

d$)x||(yb)||(c==-d)$&&$e$

$(10)$ Convert the following EBNF into BNF:

::$=[y]$

::$=(w|x)$

:$=m\{\}m$

:$=p|q|$ null