Which of the following statements is true? 1.Comparing a static planning budget to actual costs is not a good way to assess whether variable costs are under control. 2.The main difference between a flexible budget and a static budget is that the static budget is not adjusted for changes in the level of activity. (2.5) 1) Only statement I is true. 2) Only statement II is true. 3) Both statements are true. 4) Neither statement is true.