Explain how to find the surface area of a 3-d figure

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Someone me what is the area of this figure? 18m 18m 8m 16m