Answer:
Gonna be smart. This took me a long time.
Explanation:
Result Standard Deviation, Ļ: 1.3726971700492
Count, N: 11
Sum, Σx: 105
Mean, μ: 9.5454545454545
Variance, Ļ2: Ā 1.8842975206612
Steps
Ļ2 =  Σ(xi - μ)2
N= Ā (12 - 9.5454545454545)2 + ... + (11 - 9.5454545454545)2
11
= Ā
20.727272727273
11
= Ā 1.8842975206612
Ļ = Ā ā1.8842975206612
= Ā 1.3726971700492
In simple words. A.