Cylindrical test specimens with the same dimensions as the previous questions undergoes two separate tensile tests at different strain-rates but with the same temperature (300 °C). When the gauge length reached 28 mm the force was recorded for each test. Test 1 recorded a force of 8079.15 N and test 2 recorded a force of 11723.18 N. The speed of the clamps was 400 mm/s for test 1 and 1200 mm/s for test 2. From this information, calculate the strength constant and the strain-rate sensitivity exponent.