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

Find the value of 2x^2 + 4zy + 3z^2. Where x = mean, y= median and z= mode of following number 77 104 91 97 131 48 114 119 91 117 122

x and y are distinct 2 digit numbers such that y is obtained by reversing the digits of x. Suppose they also satisfy x^2 - y^2 = m^2 for some positive integer m, then find the value of x+y+m?