3.2. Galerkin Discretization of Gravity Problem As an example of the use of the Galerkin discretization method, discretize the gravity surveying problem from Section 2.1 with the "top hat" functions (t) = x(t) in (3.7) as the basis functions, and the functions ;(s) = d(s-si) with s; (i)h (corresponding to sampling the right-hand side at the s;). Derive an expression for the matrix elements aij based on (3.5). =