The line element of point mass rho(r,t)=Mδ(r) is of the form ds2=A(r)dt 2−B(r)dr 2−r 2(dθ 2+sin 2θdϕ 2) where r=∣r∣, and A(r),B(r) both →1 as r→[infinity]. Compute the Ricci tensor and the stress-energy tensor of this point mass, and apply the Einstein Field Equations to show that A(r)=1−GM/r and B(r)=(1−GM/r)−1