The data below are taken from Josephat Shoes Store quarterly sales($1000) from 2007- 2010. Period 2007 2008 2009 2010 Q1 54 55 49 60 Q2 58 61 69 72 Q3 94 84 95 99 Q4 70 76 88 80 a. Plot the time series data and comment on the pattern depicted by the data. [5] b. Compute the 4-period centered moving averages for this data. [5] c. Fit a trendline equation to this data using the sequential coding method, starting from 1

Which of the following statements are true? (select all that apply.) a quasi-static process is one in which the system is never far from being in equilibrium. when a system can go from state 1 to state 2 by several different processes, the amount of heat absorbed by the system will be the same for all processes. the internal energy of a given amount of an ideal gas depends only on its absolute temperature. when a system can go from state 1 to state 2 by several different processes, the work done on the system will be the same for all processes. when a system can go from state 1 to state 2 by several different processes, the change in the internal energy of the system will be the same for all processes. for any substance that expands when heated, its cp is greater than its cv.