A particle with a charge of -600 nc is placed at the center

Question

Question: A particle with a charge of -60.0 nC is placed at the center of a non conducting spherical shell of inner radius 20.0 cm and outer radius 40.0 cm. The spherical shell carries charge with a uniform density of -3.19 µC/m³. A proton moves in a circular orbit just outside the spherical shell.

Part A: Calculate the speed of the proton.

m/s

I need help to find the speed of the proton.