依據(jù)表中的數(shù)據(jù)回答下列問(wèn)題: (1)該表表現(xiàn)的是遞增,遞減還是常數(shù)規(guī)模報(bào)酬的生產(chǎn)函數(shù)? (2)哪些點(diǎn)在同一條等產(chǎn)量曲線上? (3)是否存在邊際報(bào)酬遞減?