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Consider the following definition (which is type correct). ys=map head xs Select ALL of the following statements that are correct? y is a number Each element of xs must be a list ys has the same length as xs ys can be a list of numbers Question 12 Consider the following definition (which is type correct). ys= map reverse xs Select ALL of the following statements that are correct? xs can be a list of numbers ys is a list of numbers xs must be a list of lists The last element in xs is the first element in ys