I'm having trouble with this question.

Suppose there are two sectors. The labour demand in A is given by LDA=121-1.8wA and labour demand in B is given by LDB=108-3.8wa. Suppose also there are 108 workers in the economy, with overall labour supply L5=108. A. If the neoclassical model of perfect competition holds, such that wA = w and w; = w, the formula for the total aggregate labour demand in simplified form is: L\": (write the formula in your notes). Graph this aggregate demand along with the aggregate supply using the conventional economics axes. The slope of the aggregate labour demand curve is and its vertical intercept is . The competitive wage will equal w=$ . There will now be workers employed in sector B. The wage in sector B will be equal to S B. Suppose sector A unionizes. If the union behaves as a monopoly and sets the wage at $28, sector A will employ workers. The number of workers previously employed in sector A who will spill over into sector B is equal to . In this economy the union density is %. C. The relative wage gap for union workers is % while the relative wage gain is %. The counterfactual wage is $ D. If the union in sector A bargains for a wage of $28 and 9 workers decide to wait in unemployment in sector A, the wage in sector B will be wB=$ E. If the union in sector A is able to bargain for a wage of $28 without any loss of jobs, workers will spill over into sector B and the wage in sector B will be wB=$