Two series I and II are given below, each containing one wrong term. Both series follow different patterns. Identify the difference between the wrong ...

Two series I and II are given below, each containing one wrong term. Both series follow different patterns. Identify the difference between the wrong term of series II and the correct term of series I at the position of the wrong term.

Series I: $a$, $b+5$, $c+8$, $87$, $412$, $2185$, $13326$

Series II: $b+4$, $c+8$, $36$, $a+50$, $79$, $111$, $152$

Given:

1. The quadratic equation $10b x^2 - (21 - a)x + 3 = 0$ has roots $\frac{z}{10}$ and $\frac{y}{20}$, where $\frac{z}{10} > \frac{y}{20}$.
2. Any multiple of $y$ ends with digit zero.
3. $c - z = 9$ and $\text{LCM}(z, 5) = 15$.

Find the difference between the wrong term of series II and the correct term of series I at the position of the wrong term.