Write a function digits_to_words(text) that extracts all digits from the input string, spells them out as lowercase English words, and returns a new string in which they are each separated by a single space. If the input string contains no digits, then an empty string should be returned.

Jack is assisting his younger sibling mary with her mathematics assignment, which includes a study of the number system. jack explains to mary that whole numbers are counting numbers that could be used to record the number of fruits in a basket. which data type represents whole numbers? a.integers.b.floating-point numbers. c.strings.d.boolean