Question on angular momentum?

When a large star becomes a supernova, its core may be compressed so tightly that it becomes a neutron star, with a radius of about 18 km (about the size of a typical city). If a neutron star rotates once every 0.33 seconds, (a) what is the speed of a particle (in km/s) on the star's equator and (b) what is the magnitude of the particle's centripetal acceleration?