1 Context-Free Languages Are the following languages context-free or not? If yes, specify a context- free grammar in BNF notation that generates the language. If not, give an informal argument. (a) { ambac | m > n > 0,0 >0} , with alphabet E = {a, b, c} (b) { ang3n | n > 0 }, with alphabet E = {a, b} (c) { wwR | We S* and wR is w in reverse }, with alphabet ? ={a, b} (d) { a"bre" dm | n > 0, m >0}, with alphabet = {a, b, c, d} (e) { w w has no more than 3 symbols), with alphabet E={a, b}