C6 Use the data set in WAGE2.RAW for this problem. As usual, be sure all of the following regressions contain an intercep (i) Run a simple regression of IQ on educ to obtain the slope coefficient, say, ˜ δ1. (ii) Run the simple regression of log(wage) on educ, and obtain the slope coefficient, b˜ 1. (iii) Run the multiple regression of log(wage) on educ and IQ, and obtain the slope coefficients, bˆ 1 and bˆ 2, respectively. (iv) Verify that b˜ 1 5 bˆ 1 1 bˆ 2 ˜ δ 1.