Can you please help me with these questions? I will rate helpful ?

A diminishing marginal product as inputs increase means which of the following? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Average costs will remain constant. b Average costs will fall. C Average costs will eventually rise. d None of the above is true. It is marginal cost that is affected by diminishing marginal product.There is a cost function such that marginal cost is always less than average cost. What must be true about average cost? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Average cost is increasing. b Average cost is decreasing. C Not enough information to say.Firms with economies of scale will tend to be in markets that: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Are perfectly competitive. b Are characterized by a relatively small number of firms. C Tend to have higher prices than those firms with diseconomies of scale. d Tend to produce more than markets with firm with diseconomies of scale