Find an equivalent mixed number for the decimal number 16.3

Which of the following is the shape of a cross section of the figure shown below

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.