Given are five observations for two variables, x and y. 1 2 3 4 5 y 3 7 5 12 13 Round your answers to two decimal places. a. Using the following equation: 1 (x* - 1) + n Ex; 72 Estimate the standard deviation of * when x = 3. b. Using the following expression: * *ta2S + Develop a 95% confidence interval for the expected value of y when x = 3. to c. Using the following equation: 72 Spred 1 = 511 + - + n (x Estimate the standard deviation of an individual value of y when x = 3. d. Using the following expression: * = fa/2-4 pred Develop a 95% prediction interval for y when x = 3. If your answer is negative, enter minus (-) sign. to