linux

$ grep -E 'har. *ring /usr/share/dict/words charring chartering harboring Use grep to search for words in /usr/share/dict/words that match the following patterns. For each pattern, provide the regular expression you used to search for matching words as well as the list of words reported by grep. a. (2 marks) All words of length 4 whose middle two letters are oy. grep should report 7 matches. b. (2 marks) All words containing three or more zs. pizzazz would be one possible match. grep should report 4 matches. C. (2 marks) All words that start with word or worth and end in a y. worthy would be a match. If your regular expression is correct, grep should report 4 matches