Explanation :
Vectors are the quantities that have both magnitude as well as direction. In order to solve two dimensional multi charge problem, the steps are as follows :
(i) First step is to define vectors.
(ii) Second step is to find the magnitudes of vectors. For example the vector is . So,
(iii) Third step is to find x and y components.
(iv) Fourth step is to sum vector components.
(v) Fifth step is find magnitude of resultant vector (R)
(vi) Last step is to find direction of resultant vector.
Hence, this is the correct order.