Sonu buys a rectanugular wallpaper to decorate the walls of her room. She notices that the length of the wallpaper is \(5\) \(ft\) more than its breadth. If \(l\) represents the length of the wallpaper and \(b\) represent the breadth of the wallpaper. Then answer the following question based on the given situation.
1. The linear equation representing the length in terms of breadth is __________ units.
2. If the breadth is \(3.4\) \(ft\), then the length of the rectangle is ___________ \(ft\).
3. If \(A\) represents the area of the rectangular wallpaper, then the area of the wallpaper in terms of breadth is given by __________ sq.units.
4. If the breadth of the rectangular wallpaper is \(3.4\) \(ft\), then the area of the rectangular wallpaper is ___________ \(ft^{2}\).