I need help understanding how to get the answers.

In a country called Uncle Sam Land (USL), the labor demand curve is given by: W = K - 4L Where W is the wage rate, K is a variable determined by accumulated capital stock in the country, and L is the labor force in the country. K = 500 is supplied by the capitalists in USL. Next to USL, is Aunt Lewis Land (ALL). ALL is poor and has a Dual Economy. A large numbers of workers in the agricultural sector there are not productive - they are disguised unemployed. They are looking for jobs. Wage in ALL is institutionally fixed at W = 10. Although USL had built a strong impenetrable border wall to prevent ALL migrants from moving in, a firm in USL, called "Coyote International," was able to fly over the impenetrable wall in a helicopter and bring job seekers from ALL who wanted to migrate to USL. As a result of this, USL labor force increases to 110 (L = 110 now). All workers work no matter what the wage is. What is the new national income in USL after migration takes place? Select one: O a. 6242 O b. 45000 O c. 26,242 O d. 30,800 O e. None of the above See the question above. What can we say after the migration of 10 workers from ALL to USL? Select one: a. National income in USL rises, national income in ALL falls, wages fall in USL, capitalists' income rises in AWL. O b. National income in USL rises, national income in ALL stays the same, wages fall in USL, capitalists' income rises in USL. c. National income in USL falls, national income in ALL rises, wages fall in USL, capitalists' income rises in AWL. d. National income in USL falls, national income in ALL rises, wages fall in USL, capitalists' income falls in AWL. O e. None of the above