Solve by hand and explain the process please !

(b) JobShop needs to assign four jobs it received to 5 workers. Different skills of the workers give rise to varying costs for performing the jobs as given in the table below. A in the cost matrix indicates that the worker cannot work on that job. Find the minimum cost assignment. (10 pts) 1 3 1 4 $20 $30 Job 2 $50 $40 $30 $20 $45 2 3 4 5 Worker $50 $70 $90 $70 $60 $20 $50 $60 $30 $70 $80