JB (z), first kind of solution of the Bessel equation. a) Bessel's equation of the function defined by → n = JB(z) cos(Bn)-J-g(z) sin (BT) show that it does. b) Calculate the limit of the above-defined function Y(z) for ß →n with n EN to obtain the explicit expression of the Neumann function denoted by Y, (z), which is the second kind of solution of the Bessel equation