I am very stumped with this problem and i would greatly appreciate some help:

Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber.(a)If a sample of gold with a mass of 7.637 g, is pressed into a leaf of 4.992 μm thickness, what is the area (in m2) of the leaf?(b)If, instead, the gold is drawn out into a cylindrical fiber of radius 2.300 μm, what is the length (in m) of the fiber?