Draw the state-transition diagram for a subway turnstile using the following considerations. Note that you do not need to draw a circuit or write a V HDL program to implement the state machine; just draw the state-transition diagram. The turnstile has two states, Locked and Unlocked. The turnstile accepts a token as an input; the turnstile unlocks after receiving a token. The turnstile also uses the passing of a body through it as an input; the turnstile locks after a body passes through it. The turnstile does not remember how many tokens have been entered. Any extra tokens entered while unlocked are accepted as donations.

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