1. Ahadu company produces two models of radios, modelA requires 20 min of work on assembly line 1 and 10 min of work on assembly line 1. Model B requires 10 min of work on assembly line I and 15 min of work on assembly line II. At most 22 hrs. of assembly time on line 1 and 25 hrs of assembly time on line II are available per week. It is anticipated that Ahadu company will realize profit of Birr 10 on model A and Birr 140 model. How many radios of each model should be produced per week in order to minimize Ahadu's profit