Find the extrema of f subject to the stated constraint.
f(x, y, z) = x − y + z, subject to x^2 + y^2 + z^2 = 5
maximum (x, y,z) =
minimum (x, y,z)

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer