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You may need to use the appropriate appendix table or technology to answer this question. Given are five observations for two variables, x and y. (Round your answers to two decimal places.) Xi 1 2 3 4 5 y; 4 6 6 12 15 1 + (x* - x) 2 (a) Use Sox = 51 to estimate the standard deviation of y* when x = 5. n E( x; - X) 2 (b) Use y* + ta/25 x to develop a 95% confidence interval for the expected value of y when x = 5. to (c) Use Spred = 51/ 1 + + ( * * - x ) 2 to estimate the standard deviation of an individual value of y when x = 5. E(x; - X) 2 (d) Use y* + t /25ped to develop a 95% prediction interval for y when x = 5. to