5a. If the variable expense per unit decreased and the selling price per unit and total fixed expense remained unchanged, then which of the following statements is true? The line shown in the profit graph would shift to a V-shape. The line shown in the profit graph would not change. The line shown in the profit graph would steepen. The line shown in the profit graph would flatten out. 5b. If the selling price per unit and the variable expense per unit both increased by $1 and the total fixed expense remained unchanged, then which of the following statements is true? The line shown in the profit graph would shift to a V-shape. The line shown in the profit graph would not change. The line shown in the profit graph would steepen. The line shown in the profit graph would flatten out. 5c. If the total fixed expense decreased and the selling price per unit and the variable expense per unit both remained unchanged, then which of the following statements is true? The line shown in the profit graph would shift downward but its angle in relation to the X-axis (the horizontal axis) would not change. The line shown in the profit graph would shift downward and its angle in relation to the X-axis (the horizontal axis) would flatten out. The line shown in the profit graph would shift downward and its angle in relation to the X-axis (the horizontal axis) would steepen. The line shown in the profit graph would shift upward and its angle in relation to the X-axis (the horizontal axis) would steepen