Answer:
10.a. Larger than 5%
11. a. The P-value is too large and we can conclude that the two averages are the same.
12. c. The P-value is large and statistics confirms that the data have identical averages.
Explanation:
10. the t-test gave the p-value to be 0.8816, so p-value is greater than 5%
11. Since we accept the hypothesis that the means are same, so, the P-value is too large and we can conclude that the two averages are the same.