Explain the factors in order of priority in interest rate calculation, and how are they related? Include the pyramid drawing? Explain the reason for the annuity concept and illustrate it by a drawing explaining each block? Define and explain in your own words the different investments after the use of economic decision tools and explain criteria's role? Explain the factors in order of priority in interest rate calculation, and how are they related? Include the pyramid drawing? Explain the reason for the annuity concept and illustrate it by a drawing explaining each block? Define and explain in your own words the different investments after the use of economic decision tools and explain criteria's role