P Ltd is considering a project requiring an initial cash outlay of Sh$.50$ million. The project's life is seven years, after which there would be no expected salvage value. The possible incremental after$-$tax cash inflows and associated probabilities of occurrence are as follows:

Year $1$ Net Cash Inflows and Subsequent Conditional Probabilities:

Probability Year $1$ Net Cash Inflows $($Sh$.$ 'Mill$)$ Conditional Probability Year $2-5$ Net Cash Flows $($Sh$.$ Mil$)$

$0\mathrm{.}50400\mathrm{.}2040$

$0\mathrm{.}6050$

$0\mathrm{.}2060$

$0\mathrm{.}50450\mathrm{.}1055$

$0\mathrm{.}7060$

$0\mathrm{.}2065$

The company$$s required rate of return is $12\%.$

Required:

Using decision tree analysis, compute the Expected Net Present Value $($ENPV$)$ of the project and hence calculate the standard deviation of the calculated ENPV.