<prompt> Given a list of equations and values, calculate the variance.Equation 1: x y 5Value of x: 1Value of y: 4Equation 2: y z 10Value of y: 4Value of z: 6  <response>: To calculate the variance, we need a set of numerical data. However, the given information involves two separate equations and their respective values. We cant calculate variance from the given information. Is there anything else youd like to know or a specific set of data youd like to use to calculate variance? 