Find the value of x*y*2*z/5 Where x = mean, y = median and z= mode of following number 57 59 56 81 69 55 64 63 81

If you have sticks which measure 1, 2, 3, 4, 5, 6, 7, 8 and 9 cm (one of each). How many different triangles can you make using three of the sticks?