In a learning curve application, 658.5 work hours are required for the third production unit and 615.7 work hours are required for the fourth production unit. Determine the n value and K value for the equation, Z = K (u"). Hint. Since we know both the u values (3 and 4) and the Z values (658.5 and 615.7), the ratio of these two Z values (e.g. Z4/Z3 = (4/3)". We can also know the K value (e.g. u = 1) once we get the n value.