A textbook publishing company has compiled data on total annual sales of its business textbooks for the preceding eight years: Year:$12345678$ Sales$(000)$:$40\mathrm{.}3043\mathrm{.}2047\mathrm{.}7050\mathrm{.}7054\mathrm{.}2057\mathrm{.}3063\mathrm{.}0069\mathrm{.}90$ a$-1.$ Select the correct data chart and fit an appropriate model to it$.$ Chart AChart BChart Cpicturepicturepicture $($Click to select$)$a$-2.$ Forecast the preceding eight years, and determine the forecast errors. $($Negative answers should be indicated by a minus sign. Do not round intermediate calculations and round your final answer to $2$ decimal places.$)$ YearSales$(000)$ Forecast Error Error$2140\mathrm{.}30243\mathrm{.}20347\mathrm{.}70450\mathrm{.}70554\mathrm{.}20657\mathrm{.}30763\mathrm{.}00869\mathrm{.}90$ a$-3.$ Construct $2$s control limits$.($Round the final answer to $2$ decimal places.$)2$s control limits are $\backslash$pm b$.$ Using the model, forecast textbook sales for each of the next five years. $($Round the final answers to $1$ decimal place.$)$ Year Sales$(000)$ Forecast Error$974\mathrm{.}701078\mathrm{.}501182\mathrm{.}901287\mathrm{.}401392\mathrm{.}90$ c$.$ Suppose actual sales for the next five years turn out as follows: Year:$910111213$ Sales$(000)$:$74\mathrm{.}7078\mathrm{.}5082\mathrm{.}9087\mathrm{.}4092\mathrm{.}90$Calculate the forecast errors for years $9$ to $13.$ Is the forecasting process in control?$($Click to select$)$