Solve clearly

Data describe demand for private car ownership as a function of fixed (x2) and variable costs () of owning a car and the quality of transportation system in a region (*). Consider the following linear regression model: VI = B1 + B2.x12 + B3x13 + BAXja + Eli Suppose that a researcher is testing a hypothesis that both fixed and variable costs decrease the demand to the same amount, Ho: /2 = /3. How can the researcher test the hypothesis estimating one regression and not-performing post-estimating procedures? a. estimate a regression on X/- X3, X3, and xi and make statistical inference based on t-ratio for the estimate at X2- X/3 O b. estimate a regression on X2- X3, X3, and X and make statistical inference based on t-ratio for the estimate at X3 O c. estimate a regression on X2, X2+ X3, and x/ and make statistical inference based on t-ratio for the estimate at X2+ X/3 d. estimate a regression on Xp X2+ X3, and Xi and make statistical inference based on t-ratio for the estimate at x2