$2\mathrm{.}76$ Use the density values in Table $2\mathrm{.}10$ to solve each of the following problems:

a$.$ If a bottle of olive oil contains $1\mathrm{.}2kg$ of olive oil, what is the volume, in

milliliters, of the olive oil?

b$.$ A cannonball made of iron has a volume of $115c{m}^3.$ What is the mass, in kilograms, of the cannonball?

c$.$ A balloon filled with helium has a volume of $7\mathrm{.}3L.$ What is the mass, in grams, of helium in the balloon?