Mark A. Clark, 56, a lifelong Haverhill resident, died Feb. 19. A graduate of Whittier Regional Vocational Technical High School with the class of 1980. He was employed as a machinist. Calling hours are Monday, Feb. 25 from 5-7 p.m. at the Kevin B. Comeau Funeral Home, 486 Main St., Haverhill. Funer