Using the following context-free grammar

E E + T | T

T T F | F

F (E) | a

Give parse trees and leftmost derivations for the following strings.

1. a

2. a*(a+a)

3.a+a+a

4.((a+(a)))

Draw a syntax diagram for the following c++/java constucts

a.Statement_block

b.Variable declaration statement

c. for_statment