3. At the start of October 2021, cumulative number of COVlD19 cases for the state of Idaho are recorded every 2 days in the chart below. Use this data to answer the following questions. days (1\") 0 2 4 6 8 10 total cases 257,322 260,012 261,459 264,661 267,664 268,660 (a) Find a good approximation of the ROC at t = 4. Include units. (b) Write the linearization for the total number of COVID19 cases statewide at t = 4. (c) Find the linear approximation for the total number of COVlD19 cases statewide at t = 5. (d) If the actual number of cases statewide at t = 5 is 263,294, what is the error in the approximation found in part (c)