If the material sought is a combination of both ordinary and opinion work-product, courts will review the document in camera to determine what part is ordinary and what is opinion, Parks, 451 A.2d at 608 (citing AT&T, 86 FRD, Guideline No. 3 at 608), and will apply the appropriate standard to each part, id. (citing Saunders v. United States, 316 F.2d 346, 350-51 (1963)).