2. An article in the Journal of Agricultural Engineering Research (1992, Vol. 52, pp. 53-76) described an experiment to investigate the effect of drying temperature of wheat grain on baking quality bread. Three temperature levels were used, and the response variable measured was the volume of the loaf of bread produced. The data are as follows: Temperature (°C) 70.0 Volume (CC) 1245 1235 1285 1245 1235 75.0 1235 1240 1200 1220 1210 80.0 1225 1200 1170 1155 1095 To avoid laborious manual input, the above data has been saved to a text file called "Volume.txt". You can read it into R using read.table() function. (a) (15 pts) Does drying temperature affect mean bread volume? Use a 0.05 and aov() function in R to answer the question. (b) (20 pts) Verify all sum squares, mean squares, and F-statistic and P-value in part (a).