Suppose I have two lists of numbers x₁, x₂,... x_n and y₁, y₂,... y_n

such that the summation k=1 to n, times x_k = 0 and y' = 4000. Find z bar for the new list defined by: z_i= 500 + 1.2y_i + x_i

for i = 1, 2, . . . , n.