Four students from University `U_1`, one of themis Mr.A, and five students from University `U_2`,one of them is Mr.B, are going to see anInter University Cricket tournament. However,they found, that only 5 ticket remaining, so 4 of them must go back. Suppose that atleastone student from each University must go tosee the game, and at least one of Mr.A andMr.B must go to see the game.Number of waysof selecting 5 students satisfying the aboveconstraint, is equal to