CFA Question $-$ How to Solve for NPV of Unconventional Cash Flows using Financial Calculator NPV inputs

Gerhardt Corporation NPV II

Assume that Gerhardt Corporation is considering a capital investment of $50$ million today with the following estimated cash flow schedule over the next five years $($all amounts in millions of euros$).$

t $=0,1,1\mathrm{.}5,2,3,4,5$

Cash flow $=50,10,-513,16,19,23,$

If the required rate of return is $10\%,$ what is the NPV of this investment and should Gerhardt make the investment?

The ANSWER is NPV$=4\mathrm{.}78.$

However, what buttons do I press using thing CF and NPV functions on my BA II Plus Financial Calculator to solve this? $($Not manually solving for each part of the formula, but rather using the functions on the FinCalc.$)$