2 Quick Single Concave Question (noob)

As shown in my drawing, is concave area correct?


Also, with stringer line, should it be parallel to rail line from nose to tail, or should it be deepest in the front foot area, tappering into and out of it?


Sorry for the lame drawings, any help would be greatly appreciated!


Here is my 2 cents…

Your drawing tells my you have been to “The Crook Shed”

#1 Go to errors and bugs read underground revival.

#2 study this video.

Hope you fare well!