Out-of-pocket spending in a country for health care increased between 2004 and 2008. The function f(x)=2579 e 0.0359x models average annual expenditures per household, in dollars. In this model, x represents the year, where x = 0 corresponds to 2004.(a) Estimate out-of-pocket household spending on health care in 2008.(b) Determine the year when spending reached $2828 per household.