Statistical Inference — SPRT boundary constants for a normal mean test

From a sampling from $N(\theta,1)$ using SPRT for testing $H_0:\theta=0$ against $\theta=2$, the ASN function for $\alpha=0.05$ and $\beta=0.1$ is $E(n)=\frac{L(\theta)\log B+\{1-L(\theta)\}\log A}{E(Z)}$, where