In Outer Space,there Are Two Astronauts at Rest,one 20

In outer space,there are two astronauts at rest,one 20.0 m from the space shuttle and the other 40.0 m away from the shuttle.By using a 20-W laser,the astronaut located 40.0 m away from the shuttle decides to propel the other astronaut towards the space shuttle.He focuses the laser on a piece of totally reflecting fabric on her space suit.If her total mass with equipment is 100 kg,what is her acceleration towards the shuttle?

A) 1.3 * 10^-9 m/s²
B) 1.6 * 10^-9 m/s²
C) 1.9 * 10^-9 m/s²
D) 2.1 * 10^-9 m/s²
E) 2.3 * 10^-9 m/s²