OK, this is what I have. Since Macias never taught Turing machines , or Chomsky Hierarchy I had to learn them, even though I'm sure about many of them, it's good to review them together, I'll post my notes later on:
1- All the above
2- b
3- All the above
4- 1(01*0)*
5- 100100
6- III and IV only
7- abbb
8- IV
9- II
10- IV
11- IV
12- IV
13- IV
14-
15-
16- III
17-
18- II
19- I
20- IV
21- a string has two structurally different derivation trees
On Friday, April 5, 2013 10:21:08 AM UTC-7, Ahmed Elkatib wrote: