4. Find the value of the variable

The end points of a line segment be \(A(6\), \(6)\) and \(B(2\), \(k)\). If the mid-point \(M(x\), \(y)\) lies on the equation \(10x + 4y - 64 = 0\), find the value of '\(k\)'.

 

The value of '\(k\)' is .