I need help to solve this math.

A machine shop contains 4 ovens that are used to heat metal specimens. Subject to random fluctuations, they are all supposed to heat to the same temperature. To test this hypothesis, temperatures were noted on 19 heated metal specimens. The data were analyzed with Microsoft Office Excel at a = 0.05, which results in the following output: Anova: Single Factor SUMMARY Groups Count Sum Average Variance Column 1 4 1978.5 494.625 7.135833 Column 2 6 2895.2 482.5333 14.83867 Column 3 5 2457.1 491.42 154 177 Column 4 4 1916.7 479.175 207 2158 ANOVA Source of Variation SS if MS F P-value F crit Between Groups 693.2816 3 231.0939 2.598592 0.090683 3.287382 Within Groups 1333.956 15 88.93042 Total 2027.238 18 a. State the assumption for a one-way analysis of variance (ANOVA). b. State the number of temperatures recorded for each of the oven. c. Which value measures the overall variability of the data and which value measures the variability of the data due to random error? d. Based on either the p-value or F value, is there enough evidence to indicate that the mean temperature for the four ovens differ significantly