The manager at a car dealership wants to prepare forecasts for next year$$s quarterly car sales at his dealership. He assumes that the quarterly sales would be best estimated by a combination of trend and seasonality with a multiplicative relationship. He plans to use the equation of Ft $=700+5$t to estimate the trend, where t $=0$ refers to the first quarter $($Q$1)$ of the current year. The seasonal relatives are $0\mathrm{.}95$ for Q$1,0\mathrm{.}87$ for Q$2,1\mathrm{.}12$ for Q$3,$ and $1\mathrm{.}34$ for Q$4.$

Use this scenario to answer Questions $811.$