lease write a Scheme function i which returns a string containing only the number characters in the given string For example, if the given string is 12dffggb4 $ 5d , then the return string is 1245 You are required to (4 points) use a loop or recursion to find the number characters in a character by character analysis (3 points) provide an explanation as the program comments for the algorithm you are using (3 points) call your function using the strings 12dffggb4 $ 5d , sg6 7 F T8c fi1 0d( DK4 , and show the return string

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Question: lease write a Scheme function i which returns a string containing only the number characters in the given string. For example, if the given string

lease write a Scheme function i which returns a string containing only the number characters in the given string. For example, if the given string is "12dffggb4@#$%5d", then the return string is "1245". You are required to

(4 points) use a loop or recursion to find the number characters in a character-by-character analysis;
(3 points) provide an explanation as the program comments for the algorithm you are using;
(3 points) call your function using the strings "12dffggb4@#$%5d", "sg6#7 F^T8c fi1 0d(@DK4", and show the return string

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