Proxima Centauri, the star nearest to our solar system, is 4.3 light-years away. Use the information below to express this distance in miles.

(a) A light-year, the distance that light travels in one year, is about 5,900,000,000,000 mi.

(b) The diameter of an electron is about 0.0000000000004 cm.

(c) A drop of water contains more than 33 billion billion molecules.