Suppose we measured a set of three (3) variables, x, y and z with uncertainties o,, co, and o,and covariances cov(x,y) and cov(x,z). Consider a function f(x, y, z). What's the variance for f Actually, fis determined from x, y and z, what's the uncertainty on knowing uncertainties on x, y and z an their covariances. Give the uncertainty on f in the special case x, y and z are uncorrelated.