(1) Given f(x, y.z)= xe' + ysin(yz) -V4- x2 , find the first order partial derivatives f ff ( 12 points) (2) The table below represents R(0,v) , the range, in feet, that a ball travels if thrown with an initial speed of o ft/sec at an angle e degrees. (4 points) SPEED U (ft/s) 75 80 85 35 165 188 212 238 173 197 222 249 ANGLE & (degrees) 176 200 226 253 173 197 222 249 a) Find R(40,80). Give units and physical meaning. b) Estimate OR (40,80). Only one estimate needed (no need to average two). Interpret the physical meaning. Give proper units. Show work