discussed Cited "see" People v. Lucero See Westerberg v. District Court, 181 Colo. 10 , 506 P.2d 746 (1973), cert. denied, 414 U.S. 1162 , 94 S.Ct. 925 , 39 L.Ed.2d 115 (1974). 5 “We hold, therefore, that absent a knowing and intelligent waiver, no person may be imprisoned for any offense, whether classified as petty, misdemeanor, or felony unless he was represented by counsel at his trial.” Argersinger, 407 U.S. at 37 .