A train travels with a speed of `60 km h^(-1)` from station A to station B and returns with a speed of `80 km h^(-1)` from station B to station A. Find (i) the average speed and (ii) the average velocity of the train.

Explanation

To solve the problem, we will calculate the average speed and average velocity of the train based on the given speeds for the two legs of the journey.

### Step 1: Define the distances
Let's assume the distance between station A and station B is \(d\) kilometers.

### Step 2: Calculate the time taken for each leg of the journey
1. **Time taken from A to B**:
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