I'm trying to make a mask but am fairly new to Solidworks. I can make things that are more geometrical but am having problems trying to make a mask, which has a curved shape. I figured the easiest way to do this was to draw 3 sketches and  use loft. You can see these sketches below, but when I try to use loft is says "Loft operation failed to complete" and I'm not sure why. I am using "guide curves influency type: to next" and no tangency. I will say that some of the sketches aren't fully defined because I tried and I don't know what relation or dimension I need to add. But they are defined as best as I can.

I can add the file if needed. Thanks.