Let f equals left angle 2 xy minus z squared comma x squared plus yz comma negative 2 xz plus startfraction y squared over 2 endfraction right angle and let c be the circle r(t)equalsleft angle 5 sine t comma 2 sine t comma 4 cosine t right angle, for 0less than or equalstless than or equal 2pi. evaluate modifying below contour integral with upper c bold upper f times d bold r using any method.