The IKAROS spacecraft, launched in 2010, was designed to test the feasibility of solar sails for spacecraft propulsion. These large, ultralight sails are pushed on by the force of light from the sun, so the spacecraft doesn't need to carry any fuel. The force on IKAROS's sails was measured to be 1.12 mN.

If this were the only force acting on the 290 kg spacecraft, by how much would its speed increase after 3.0 months of flight? 

Assume there are 30 days in each month.