Answer:
A 
IRR = 8.27%
B
IRR = 4.69%
C
IRR = 10.77%
D
IRR = 9.47%
E
IRR = 4.81%
Explanation:
Here is the table containing information on the investments 
 Initial investment value  Future Investment Value Year 
$1,100                                    $2,637                           11                                 $9,500                                 $13,091                             7                                   $400                                     $1,855                             15                              $3,200                                  $5,030                              5                            $6,000                                   $9,598                            10
Internal rate of return is the discount rate that equates the after-tax cash flows from an investment to the amount invested
IRR can be calculated with a financial calculator  
A 
Cash flow in year 0 = $-1,100 
Cash flow from year 0 - 10 = 0 
Cash flow in year 11 =    $2,637   
IRR = 8.27%
B
Cash flow in year 0 = $-9,500
Cash flow from year 0 - 6 = 0 
Cash flow in year 7 = $13,091  
IRR = 4.69%
C
Cash flow in year 0 = $-400
Cash flow from year 0 - 14 = 0 
Cash flow in year 15 = $1,855   
IRR = 10.77%
D
Cash flow in year 0 = $-3200
Cash flow from year 0 - 4 = 0 
Cash flow in year 5 =   $5,030  
IRR = 9.47%
E
Cash flow in year 0 = $-6000
Cash flow from year 0 - 9 = 0 
Cash flow in year 10 = 9598 
IRR = 4.81%
To find the IRR using a financial calculator:
1. Input the cash flow values by pressing the CF button. After inputting the value, press enter and the arrow facing a downward direction.
2. After inputting all the cash flows, press the IRR button and then press the compute button.