A coin of density 6000 kg/m³ is tossed into a well, full of an ideal fluid, and accelerates downward at 5.0 m/s² when moving through the fluid. What is the density of the fluid?

a) 1000 kg/m³
b) 2000 kg/m³
c) 3000 kg/m³
d) 4000 kg/m³
e) 5000 kg/m³