Prepare an algorithm that will add up two numbers and calculate the average of the two numbers?

1. Start
2. Input the first number (num1)
3. Input the second number (num2)
4. Add num1 and num2 to get the sum (sum = num1 + num2)
5. Calculate the average by dividing the sum by 2 (average = sum / 2)
6. Output the sum and average
7. End

Algorithm to Add and Average Two Numbers

Inputs: Two numbers, `a` and `b`

Output: Average of the two numbers

Steps:

1. Add the two numbers: Set `sum` equal to `a` plus `b`.
2. Calculate the average: Set `avg` equal to `sum` divided by 2.
3. Return the average: Return the value of `avg`.

Example:

If `a` is 5 and `b` is 10, then:

1. `sum` = 5 + 10 = 15
2. `avg` = 15 / 2 = 7.5
3. Return 7.5

Pseudocode:

```
algorithm add_and_average(a, b)
sum = a + b
avg = sum / 2
return avg
end algorithm
```