A 5.8-mm-diameter proton beam carries a total current of 1.5 mA . The current density in the proton beam, which increases with distance from the center, is given by J=Jedge(r/R) , where R is the radius of the beam and Jedge is the current density at the edge.

Part A: How many protons per second are delivered by this proton beam?

Express your answer using two significant figures.

N = ??? protons per second

Part B: Determine the value of Jedge.

Express your answer to two significant figures and include the appropriate units.