2. [36 pts. total] Consider the following wage model to be estimated: 111i wage): d+ u Edu+ {31 Degree +;92 Exp+B3 Exp2+u where Edu = years of education Degree = 1 if you hold a college degree {II} if not) Exp = years of work experience a. {4 pts.) We expect the sign of EU to be positive if the model holds. b. {6 pts.) Why might '80 be overstated? Explain. c. {4 pts.) Given the shape of the wageschooling locus, what else might we include in our wage equation