please solve for each part

Question 3 Assume an employer has incomplete information and relies on education (degree qualifications) as a signal to determine the ability of potential employees. High ability workers are expected to have a degree while low ability workers are not expected to have a degree. The cost of a degree for high ability workers is c while low ability workers have no choice and cannot obtain a degree. If the employer can tell high and low ability workers apart, they are paid the wages w, and w, respectively, where w;