Indicate how each of the following would shift the (1) marginal

Indicate how each of the following would shift the

(1) marginal cost curve,

(2) average- variable cost curve,

(3) average fixed cost curve, and

(4) average- total cost curve of a manufacturing firm. In each case specify the direction of the shift.

A reduction in business property taxes

An increase in the nominal wages of production workers.

A decrease in the price of electricity.

An increase in insurance rates on plant and equipment.

An increase in transportation costs.