Indicate how each of the following would shift the (a) marginal-cost curve, (b) average-variable cost curve, (c) average-fixed-cost curve, and (d) average total-cost curve of a company that operates in Sackville. In each case specify the direction of the shift. 9.1 An increase in the provincial minimum wage rate in 2018-2019, 9.2 A decrease in the provincial corporation income tax rates in 2018-2019.