Huawei has spent $1\mathrm{.}5$B in R&D and is ready to launch the first foldable cellphone Mate X$.$ However,

they are not sure about whether consumers will like their new phones. They can choose to launch the

product at year $0$ or year $1.$ The costs of production will be the same whether they enter the market in

year $0$ or year $1.$ The life of Mate X will be $2$ years in either case. The relevant cash flow information is

given below. Suppose the unit sales will be X and $0\mathrm{.}5$X in the first and second year. The equipment will

be depreciated in $3$ years wi