Question: For [w,x,y,:) determine the number string in of length 5 (a) that start with r; (b) with precisely iwo w's; (C) with no w's;

For ∑ [w,x,y,:) determine the number string in of length 5 (a) that start with r; (b) with precisely iwo w's; (C) with no w's; (d) with an even number of ws.

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