A person goes to post office slowly, purchases postcards and comes back speedily. Draw time - velocity and time - displacement graphs.

Explanation

To solve the problem of drawing time-velocity and time-displacement graphs for a person who goes to a post office slowly, purchases postcards, and comes back quickly, we can break it down into steps:

### Step 1: Understand the Motion
The person travels to the post office at a slow speed (let's denote this speed as \( v \)) and returns at a faster speed (let's denote this speed as \( v' \)). The journey consists of two parts:
1. Going to the post office (A to B)
2. Returning from the post office (B to A)

### Step 2: Define the Time Intervals
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