Consider the vectors: \underline{\mathbf{a}}=1 \hat{\mathbf{i}}+5 \hat{\mathbf{j}}+9 \hat{\mathbf{k}} \underline{\mathbf{b}}=2 \hat{\mathbf{i}}+5 \hat{\mathbf{j}}+11 \hat{\mathbf{k}} \mathbf{c}=10 \hat{\mathbf{i}}+-2 \hat{\mathbf{j}}+7 \hat{\mathbf{k}} Find: b x c = Find: a· b= Find the angle between vectors a and

b Angle =