It costs $$5$ to provide one impregnated bed net $($a net$)$ to one person in Mozambique. Each net lasts

for $3$ years $($the current year, next year, and the year after it$),$ adding $0\mathrm{.}5$QALY in each year. Assume

that $1$QALY$=$$$500$ and that the discount rate is $10\%.$

$($a$)$ Find the NPV of providing a net to one person in Mozambique. Be sure to explain all the

calculation steps.

$($b$)$ Would you say it is a worthwhile intervention?

$($c$)$ What is the shadow price of a bed net?