The answer to the question is 4.5
The mode is the score that she scored most frequently. All the scores where attained once except 80, thus 80 is the mode.
The formula for surface area of a triangular prism is
SA = 2(L)(W) + 2(W)(H) + 2(H)(L) * 1/2
SA = 2(3)(2) + 2(2)(4) + 2(4)(3) * 1/2
SA = 12 + 16 + 24 * 1/2
SA = 52 *1/2
SA= 26sq in
I hope this helped!:)