Clockwise is taken as the positive sense. A flywheel initially rotates at 120 rad s⁻¹ clockwise and is brought to rest by a uniform angular retardation while turning through 480 rad. Which of the following sets correctly gives the signs of the initial angular velocity (ω₀) and angular acceleration (α) in this sign convention?
a) ω0: positive, α: positive
b) ω0: negative, α: positive
c) ω0: positive, α: negative
d) ω0: negative, α: negative