1. Let's first state the problem: We need to find the area and perimeter of problem 3. 2. Since the problem details are not provided, let's assume problem 3 refers to a rectangle with length $l$ and width $w$. 3. The formula for the area of a rectangle is $$\text{Area} = l \times w$$. 4. The formula for the perimeter of a rectangle is $$\text{Perimeter} = 2(l + w)$$. 5. To find the area and perimeter, we need the values of $l$ and $w$. 6. If you provide the length and width, I can calculate the exact area and perimeter for you.