The figure below depicts the cross section of an infinitely long cylindrical shell concentric with an infinitely long cylindrical wire.
![1133_Depicts the cross section of an infinitely long cylindrical shell.png](https://secure.tutorsglobe.com/CMSImages/1133_Depicts%20the%20cross%20section%20of%20an%20infinitely%20long%20cylindrical%20shell.png)
a) What is the electric field between the two cylinders (a < r < b)? (Hint: Use Gauss's Law)
b) What is the electric field outside of both of the cylinders (r > c)?