Calculate the coulomb force on q. They are all in a straight line q1, q2,q3.

Q1:1.05 micro coulombs
Q2:5.51 micro coulombs
Q3:-2.15 micro coulombs
The distance, r1, between q1 and q2 is 20.1cm.
The distance, r2, between q2 and q3 is 15.3 cm.

Also, calculate e coulomb force on q2