What is the effect of a lump-sum franchise tax of t on the quantity at which a firm's O after-tax average cost curve reaches a minimum? (Assume that the firm's before-tax average cost curve, ACT, is U-shaped.) Determine the average tax per unit of output. The average tax per unit of output, q, is ACBT average tax = (Properly format your expression using the tools in the Cost per unit, $ palette. Hover over tools to see keyboard shortcuts. E.g., a fraction can be created with the / character.) For example, if the firm sells only 1 unit of output, then its average cost in taxes is equal to t. If the firm sells 100 units of output, then its average cost in taxes is equal to (Properly format your expression using the tools in the palette.) q, Units of output