Having heard about IPO underpricing, I put in an order to my broker for
 2,300 shares of every IPO he can get for me. After 3 months, my 
investment record is as follows:
IPO           Shares Allocated to Me                 Price per Share               Initial Return
A                                             850                                         $10                         7%     
B                                             550           
                              20                           
                15         
C                                             2,300                    
                   6                                            
−4        
D                                             0       
                                       10        
                                   26        
Required:
a.            What is the average underpricing of this sample of IPOs?
b.            Calculate the average initial return, weighting by the amount of money invested in each issue. 
