During sewage treatment, bacteria and fungal filaments aggregate to form flocs.
Flocs help in the breakdown of organic matter and are an essential part of biological treatment.
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?