Which of the following regular expressions will match a sequence of lower case letters that start with t and end with s, and have from three to five letters separating them? Please choose the two correct choices.

		t\w{3,5}s
		t[a-z]{3,5}s
		t\w\w\w\w?\w?s
		t[a-z][a-z][a-z][a-z]?[a-z]?s'