Which of following are implicit costs a typcial firm

1, which of following are implicit costs a typcial firm?a, insurance. b, electricity. c, opportunity costs of capital owned by the firm. d, cost of labour hired by the firm.2, the short run is a period of time:a, in which a frim uses at least one fixed input. b, that is long enough to permit changes in the firm’s plan sizec, in which production occurs within one year. d, in which production occurs within six months3, in the short run, if a perfectly compettive firm is producting at a price above average total costm its economic profit must be:a, postive. b, zero. c, negative. d, normal4, the long run equilibrium condition for perfect competition is:a, P=AVC=MR=MC. b, Q=AVC=MR=MC. c, Q=ATC=MR=MC. d, P=ATC=MR=MC5, Monoploy is a market structure characterised by:a, a couple of large sellers. b, a high-quality product. c, a high entry barrier to the market. d, many close substitules.6, what should a profit-maximising monopolist do if she is currently producing where MC=MR?a, decrease output until MC=MR. b, increase out put until MC=MR. c, shut down in the long run. d, keep producing at this level.