Exercise 2: Program periodic surfaces - Periodic surfaces: ( r ) = l = 1 L m = 1 M l m cos ( 2 l ( p m T r ) ) = 0 l m is a periodic moment l is a scale parameter p m is a basis vector r is a location vector 1. Construct a function in Python with l m , l and p m as inputs and as output 2. Plot P, D, and G types of surface with your function. You can choose any scale parameter..