The perimeter, area, and volume of a tetrahedron (the solid whosefaces are 4 equilateral triangles) are respectively: P=6a, A=3 1/2 a2, and V=2 1/2 a3 /12. Where a is the length of an edge which is measured to be 69 cm± 1 cm. What is the percent uncertainty in the length of an edge, and what are the absolute and percent uncertainties in the perimeter, area, and volume of the tetrahedron?