4. Construct npda's that accept the following languages on 2 (a, b, c. (a) L (a"b?n:n 20). (b) L- (wcw we (a, b)* (d) L = {a"b" +men : n 0, m 21 } (e) L=(a3bnc" : n20} . (f) L = {a"y": n m 3n). (g) L = {w : na (w) = nb (w) + 1). (h) L- (w:ma (w) 2n, (w)). (i) L = {w : na (w) + nb (w)=nc (w)). G) L (w: 2na (w) n, (w) 3n (W)). (k) L (w na (w)<>