PowerPoint Presentation = + − = 1 7 3 7 = + − = 4 7 + = − = − = − = = + − == + = + = + − = − = + = + = − = − = + = − = + = + + = − = + = + = + = − = + = + + + = − − − = + = + + + + = + + + − = + + + =.
= + = + − − 7 = = − = − + = − = = = + = + − = = + = + − = − = + = + = − = − = + = − = + = − + + = = + = + = + = + = + = + = − = − = − = − = − = − = − − =