6-Explain the relationship between risk and uncertainty which help decision makers to take important decisions? 7-There are some problems encountered when analyzing a project and some types of obstacles may face the decision maker, such as: Choosing between scenarios and alternatives Appraising value Determining the optimal values for decision variables Explain how the uncertainty in these can be quantified to reduce the associated risks? 8-Decision making might be classified into one of several situations: 9-List such outcomes and explain if you relay on one of the above? List typical sources of uncertainty and risks in onshore vs offshore? 11-Explain the factors in order of priority in interest rate calculation, and how are they related? Include the pyramid drawing? 12-Explain the reason for the annuity concept and illustrate it by a drawing explaining each block? 13-Define economic recession and depression and how does that affect the oil & gas industry? What are the causes of inflation and how are they controlled? Whats the major factor affecting inflation? How is inflation measured in a single economy? What are the affects of GDP (give e.g.), CPI (give e.g.), PPI (give e.g.) and how its related to the oil & gas industry? What is the difficulty here? 14-Define and explain in your own words the different investments after the use of economic decision tools and explain criterias role?