7rt A spring hanging vertically is stretched and its height, in inches, above ground after t seconds is given by h(t) = 50 8 cos (F) Round all numerical answers to the nearest tenth and give correct units where appropriate. a. How high is the spring after 4 seconds? b. What is the spring's velocity after 4 seconds? c. What is the spring's acceleration after 4 seconds? cl. Is the spring moving up or down at t = 4 seconds? Brieyjustify your conclusion. 6. Is the spring speeding up or slowing down at t = 4 seconds? Brieyjustify your conclusion. Problem 2: Approximate the value of sin(31) using linear approximation. [Hint: Convert 31 to radians]. Round your answer to 5 decimal places. For this problem, you may use a calculator approximation of 71', but you cannot use a calculator approximation for sin(31 )