Issue with finding the 95% in question b

television advertising ($1 ) and newspaper advertising (12 ). values of y, 1, and 12 are Weekly Gross Television Newspaper Revenue Advertising Advertising ($1000s) ($1000s) ($1000s ) 96 5.0 1.5 90 2.0 2.0 95 4.0 1.5 92 2.5 2.5 95 3.0 3.3 94 3.5 2.3 94 2.5 4.2 94 3.0 2.5 The estimated regression equation was y = 83.23 + 2.29x1 + 1.30x2 a. What is the gross revenue expected for a week where $3,500 is spent on television (x1 = 3.5) and $1,800 is spent on newspaper advertising (T2 = 1.8) (to 3 decimals)? $ 93.585 thousand b. Provide a 95% prediction interval for next week's revenue, assuming that the advertising expenditures will be allocated as in part (a) (to 2 decimals). 79.18 thousand, $ 87.28 thousand)