Solve the 23rd question.

20. Interleave two strl's the machine halts after writing on the tape an interleaved string composed of the firs and so on, e of the two strings, followed by the second elements of the two strings, a the last elements of the two strings, in that order B. Make changes to the given Turing machine. 26- 21. Modify the Turing machine shown in Fig. 10.13 to accept wew where w (a + bie and special character separating the two parts 22. Show what happens when the Turing machine in Fig. 10.9 is given the input 000011122 C. Debug and fix the following Turing machines. 23. The Turing machine to compute the weight of a binary string, that is, the number of Isi string (to be written as a unary number on the tape) shown in Fig. 10.15. the o.aR 1:1, R 1:1, R 41 FIGURE 10.15 24. The Turing machine to accept a given binary string if it has an ungqual number of Os and ls