Find the current value of the following ordinary annuities. (Notes: If you are using a financial calculator, you can enter the known values and then press the appropriate key to search the unknown variable. Then, without clearing the TVM register, you can "override" the variable that changes by easily entering a new value for it and then pressing the key for the unknown variable to obtain the second answer. This procedure can be used in many situations, to see how changes in input variables affect the output variable. Also, note that you can leave values in the TVM register, switch to "BEG," press FV, and Determine the FV of the annuity due.)