Verified Answer :

Formula of the Volume of this prism = Area of Base × Height of prism
Lets find the area of the base
                        =Base×Height
                        =2\(\frac{1}{6}\)×1\(\frac{1}{4}\)
                        =\(\frac{13}{6}\)×\(\frac{5}{4}\)
              (Changing the mixed fraction to an improper fraction is helpful)
                        =\(\frac{65}{24}\) ft² = 2\(\frac{17}{24}\) ft²
Volume of the prism: 
              =Area of base × Height of prism
              =2\(\frac{17}{24}\)×2\(\frac{2}{3}\)
       (Change it to improper fraction again)
              =\(\frac{65}{24}\)×\(\frac{8}{3}\)
              =\(\frac{65}{9}\) ft³ = 7\(\frac{2}{9}\) ft³
The answer is D: 7\(\frac{2}{9}\) cubic feet