[To Parent Directory] 8/8/2026 10:01 AM 412301 ch4.1.pptx 8/7/2026 10:19 AM 680416 ch4.2.pptx 8/5/2026 12:24 PM 314306 ch4.3.pptx 8/5/2026 12:26 PM 245702 ch4.6.pptx