Find the energy of the reaction `.^(14)N(alpha, p) .^(17)O`, if the kinetic energy of the incoming `alpha`-particle is `T_(alpha) = 4.0 MeV` & the proton outgoing at an angle `theta = 60^(@)` to the motion direction of the `alpha`-particle has a kinetic energy `T_(p) = 2.09 MeV`.