Question: In java Given an input sentence, output the sentence with an extra ! if the last character wasn't a period or !. If the input

In java
Given an input sentence, output the sentence with an extra ! if the last character wasn't a period or !. If the input is "Who are you?", the output is:
Who are you?!
11.11 LAB:Append exclamation (branches, stringe) Given an input sentence, output the sentence with an extra! if the last character wasn't a period or!. If the input is "Who are you?", the output is: Who are you
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