how to calculate u(x,t)=exp(t-x) for 0<x<1, 0<t<1.by taking increment of 0.1.also draw two dimensional graph of u w.r.t x and t.Draw three dimensional graph.

explain each step in detail.

[John D'Errico]

Ok, so we need to do your work for you, AND explain each step in detail? Why not make an effort?