A solid conducting sphere of radius 2.00 cm has a charge of 7.40 µC. A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with the solid sphere and has a charge of -2.70 µC. Find the electric field at the following radii from the center of this charge configuration:

Congratulations on copy and pasting your homework question onto this forum. Unfortunately, there were three problems with your attempt:

1) Copying and pasting often results in unexpected characters, making it difficult to read the units in your case. Hence, you should always proof-read before submitting.

2) You forgot to include a crucial part of the question, the radii where you're supposed to find the electric field.

3) WE'RE NOT HERE TO DO YOUR HOMEWORK FOR YOU!! If you want HELP with your homework, copy the problem correctly, and then show us what you've done so far and where you're getting stuck.