Find the area of the region enclosed by fx and the xaxis for

Find the area of the region enclosed by f(x) and the x-axis for the given piecewise function on the specified interval. f(x)=3, if x<1
3x^2, if x is greater than or equal to 1, both on [0,5]

3 from 0 to 1 would be 3*1=3 int 3x^2 dx from 1 to 5 would be x^3 from 1 to 5 or 125-1=124 So 124 +3=127