Is the Analyst's Report Worth Its Fee

An investment pays $+14$ if a deal closes and $-10$ if it falls through; closing has prior probability $\frac12$. You may invest or pass (pass pays $0$). For a fee of $2$ you may buy an analyst report that correctly predicts the outcome with probability $\frac{7}{10}$, after which you decide. Should you buy the report, and what is its value net of the no-report optimum?