If ` vec aa n d vec b` are position vectors of points `Aa n dB` respectively, then find the position vector of points of trisection of `A B` .

Explanation

To find the position vectors of the points of trisection of the line segment joining points A and B, we will use the section formula. We denote the position vectors of points A and B as \( \vec{a} \) and \( \vec{b} \) respectively.

### Step-by-Step Solution:

1. **Understanding Trisection**:
The points of trisection divide the line segment AB into three equal parts. Thus, we will have two points, C and D, such that AC = CD = DB.

2. **Using the Section Formula**:
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