A toy cannon of mass 1.0 kg is initially at rest on a horizontal surface when it launches a 0.05 kg projectile with a velocity of 10 m/s at an angle of 60 degrees above the horizontal. What is the speed of the 1.0 kg cannon immediately after the projectile is released, assuming that friction is negligible?
a) 0.5 m/s
b) 1.0 m/s
c) 2.0 m/s
d) 5.0 m/s