Based on the book skills for accounting research 4th edition chapter six answer this: Chapter 6 - Review Questions 

a. Contrast the existing CON 5 versus CON 6 approaches to revenue recognition. Which model is more similar to the revised revenue recognition model? 

b. To locate guidance about the five steps in the revised revenue model, a researcher should consult (at a minimum) the ___________ and __________ sections in ASC 606. 

c.. Why is it important to determine whether promises made to the customer are distinct? What’s the significance of this concept? 

d. .What does it mean for a tax position to be “effectively settled”?