I. Give parse trees and derivations for each string a. a c. a+a+a b. ata Answer each part for the following context-free grammar G T. a. What are the variables of G? b. What are the terminals of G c. Which is the start variable of G? d. Give three strings in L(G). e. Give three strings not in L(G) f. True or False: T = aba g. True or False: Taba. h. True or False: TT. i. True or False: T j. True or False: XXX aba. k. True or False: X l. True or False: T m. True or False: T n. True or False: SE. o. Give a description in English of aba XX. xxx L(G)