Answer
We can rank the segments according to the magnitude of the average electric field in them:
$b = d \gt a = c = e$
Work Step by Step
Across sections $a, c,$ and $e$, the potential difference is zero, so the electric field is zero.
Across sections $b$ and $d$, the potential difference is non-zero, so the electric field is non-zero.
Since $R_1 = R_2$, the magnitude of the potential difference is equal so the magnitude of the electric field is equal.
We can rank the segments according to the magnitude of the average electric field in them:
$b = d \gt a = c = e$
