A firm which uses its WACC for average-risk projects adds and subtracts 3 percentage points for above-average and below-average risk projects, respectively. If its WACC is 8%, which of the following projects should be accepted and why? Project 1: E(r)=9%; Riskiness: Average; Project 2: E(r)=9%; Riskiness: Above Average; Project 3: E(r)=11%; Riskiness: Average; Project 4: E(r)=5%; Riskiness: Below Average; Project 5: E(r)=8%; Riskiness: Below Average; Project 6: E(r)=10%; Riskiness: Above Average