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What is a 95% confidence interval for the mean photosynthesis output among trees with soil water content ratio of 0.1? You may use the results from the following R commands: > predict(aspen_lm, newdata = data. frame(soil_water = 0.1), + interval="confidence", level = 0.975) fit Lwr upr 1 11. 18778 9.587318 12.78824 > predict(aspen_lm, newdata = data. frame(soil_water = 0.1), + interval="confidence", level = 0.95) fit Lwr upr 1 11. 18778 9. 79365 12.58191 > predict(aspen_lm, newdata = data. frame(soil_water = 0.1), + interval="prediction", level = 0.975) fit Lwr upr 1 11. 18778 2.47678 19.89878 > predict(aspen_lm, newdata = data. frame(soil_water = 0.1), + interval="prediction", level = 0.95) fit Lwr upr 1 11.18778 3.599806 18.77576 (2.477, 19.899) (9.587, 12.788) (9.794, 12.582) (3.600, 18.776)