Which of the items below would be considered the densest? (To be awarded credit, you must not only have the correct answer but show your step-by-step work for calculating density of each, in the units of g/mL, to support your final answer. This includes any work required to convert units.)

a. A piece of wood with a volume of 0.5 L and a mass of 10.5 kg

b. A ball with a volume of 110 mL and a mass of 520 mg

c. A tire with a volume of 1.10 L and a mass of 2.22 x 10⁴kg

d. A wire with a volume of 3.91 x 10^-7L and a mass of 7.93 x 10^-2mg

e. A block of metal with a volume of 1050 mL and a mass of 1.29 x 10³g