2.15. (a) An instrument is calibrated in an environment at a temperature of 20°C and the following output readings y are obtained for various input values .x: y 13.1 26.2 39.3 52.4 65.5 78.6 5 10 15 20 25 30 Determine the measurement sensitivity, expressed as the ratio y/x. (b) When the instrument is subsequently used in an environment at a temperature of 50°C, the input/output characteristic changes to the following: y 14.7 29.4 44.1 x 5 10 15 58.8 20 73.5 88.2 25 30 Determine the new measurement sensitivity. Hence determine the sensitivity drift due to the change in ambient temperature of 30°C.