2. (20%) A study on cortex development in the Norway rat investigated both diet and physical environment as factors in brain development. Twenty-four two-week old rats were randomly placed in one of two environments, stimulating or control, and they were fed either commercial rat chow or an enriched, fresh food diet. After four months the rats were sacrificed and their individual cortex weights (mg) recorded below. Environment Food Stimulating Control Enriched 740 710 720 690 715 685 735 680 700 700 740 695 Control 705 660 695 655 680 690 680 670 695 640 700 675 Analyze as a factorial design two-way ANOVA (Hint: Test for: Environmental effect, food effects, and interaction; SSresidual=3921). Include mean separation techniques if appropriate.