I need answers of these questions ASAP !!please

1A. State the first theorem of welfare economics and provide a sketch of the proof. 1B. Consider a pure exchange economy with two private goods, and two con- sumers denoted A,B whose respective utility functions and initial endowments are: UA (TIA, $2A) = XIA + 2124, UB(JIB, $2B) = CIBC2B and WA = (4,0), WB = (0,4). Then, a competitive equilibrium allocation is: (a) (XIA, X24) = (4, 2), (21B, X2B) = (0,2) (b) (21A, X2A) = (2,2), (1B, 428) = (2,2) (c) (TIA, X2A) = (4, 0), (21B, X2B) = (0,4) (d) (ZIA, $2A) = (0, 2), (21B, $28) = (4, 2) (e) none of the previous answers is correct (NOPAC)