Question 3 5 pts Given the production function 3' = 431+ 3172, what is the marginal rate of technical substitution of x1 for x2( MRquz)? O 0.75 O -1.33 0 452/171 O -2x1/x2 Question 4 5 pts For the production function :V = 3161+ 4-362, which of the two inputs is more productive when x1 is 2 and x2 is 4? O x1 O x2 0 neither; for this situation, they have equal marginal products O cannot tell from the above information