Final answer is an integer. Write your answer in digits only. Punctuations, letters and words are not allowed. Solve the problem below. 5 points 18. Vertex A of section ABC is at the midpoint of the edge of the cube as shown. lfthe area of the section is 25 sq. in... then the Volume of the cube may be expmsed as V : minn irr.'I where m and n are integers Find the smallest sum of m and n. \f19. Section ABCD is 10 cm"and A, B, C, and D are midpoints of the edges of a cube. The side length of the cube may be expressed as a = YVB cm where y. B and o are integers. Find the smallest sum of y, B and 8. B D20. Each of the vertices of section ABCD is at the trisection of the edges of the cube as shown. B The area of the plane ABCD may be expressed as ( "JP ) at cm : where y. p, and u are integers, and a is the edge of the cube. Find the smallest sum of y, p, and u