PROBLEMS 14.9 In Problems 1-24, use a definite integral to find the area of the region bounded by the given curve, the x-axis, and the given lines. In each case, first sketch the region. Watch out for areas of regions that are below the x-axis. 1. y = 5x +2, x=1, x=4 2. y=x+5, x=2, x=4 3. y=3x, x=1, x= 3 4. y=x, x=2, x= 3 5. y=x4x+x, x=1 6. y= x - 2x, x=-3, x=-1 7. y = 3x2 - 4x, x= -2, x=-1