Question refers to the following regression estimated on 64 observations: Y t =\(\beta\) 1 + \(\beta\) 2 X 2 t + \(\beta\) 3 X 3 t + \(\beta\) 4 X 4 t + u t -Which of the following null hypotheses could we test using an F-test? (I) \(\beta\)<sub>2</sub><sub> </sub>= 0 (ii) \(\beta\)<sub>2</sub><sub> </sub>= 1 and \(\beta\)<sub>3 </sub><sub>+ </sub>\(\beta\)<sub>4</sub> = 1 (iii) \(\beta\)<sub>3</sub>\(\beta\)<sub>4</sub><sub> </sub>= 1 (iv) \(\beta\)<sub>2</sub><sub> </sub>-\(\beta\)<sub>3 </sub>-\(\beta\)<sub>4</sub><sub> </sub>= 1 A) (i) and (ii) only B) (ii) and (iv) only C) (i), (ii), (iii) and (iv) D) (i), (ii), and (iv) only