A rectangular garden has a length of \((2x+3)\) \(meters\) and a breadth of \((x-1)\) \(meters\). The school plans to lay grass over the entire garden and needs to calculate the area using polynomial multiplication. They also want to add a border around the garden, so they decide to compute the perimeter to estimate the fencing required.
1. What is the area of the garden?
2. If \(x=4\) \(meters\), what is the length of the garden?
3. If \(x=4\) \(meters\), what is the breadth of the garden?
4. If \(x=4\) \(meters\), what is the area of the garden?