Consider a Turing machine whose transition function is partially specified below:
S(q, b) = (a,q',R)
S(q', a) = (a, q, R)
S(q, *) = (b, q' L)
Below are four Turing machine configurations:
q
q
V
2:
1:
abad****
....
abba****
q'
q'
D
II
4:
3:
abaa***
abaab***
The current configuration of a Turing machine is shown in drawing 1. Which drawing shows the configuration of the Turing
machine after two steps?
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