P-value for exponential scale test

Let $X_1, X_2$ be a random sample from a distribution having a probability density function $$f(x; \theta)=\begin{cases} \frac{1}{\theta} e^{-\frac{x}{\theta}}, & \text{if }x > 0, \ 0, & \text{otherwise,} \end{cases}$$ where $\theta\in(0, \infty)$ is an unknown parameter. For testing the null hypothesis $H_0: \theta=1$ against $H_1: \theta\neq 1$, consider a test that rejects $H_0$ for small observed values of the statistic $W=\frac{X_1+X_2}{2}$. If the observed values of $X_1$ and $X_2$ are $0.25$ and $0.75$, respectively, then the $p$-value equals __________ (round off to two decimal places)