Exoplanets are planets detected in orbit about distant stars. Four exoplanets have been detected orbiting a star. It has been determined that one of the exoplanets has an orbital period of 0.0060 years, and an orbit's semi-major axis of 0.039 AU. Use Newton's version of Kepler's third law to calculate the mass of the star at the center of this distant planetary system. (Hint: follow the examples in the reading assignment)