The following underwriting took place: 

A: 5,000 shares 

B: 3,000 shares 

C: 2,000 shares In addition, there was firm underwriting: 

A: 1,000 shares 

B: 500 shares 

C: 1,500 shares 

The share issue was for 10,000 shares. Total subscription including firm underwriting was 8,500 shares and the forms included the following marked forms:

A: 2,000 shares 

B: 1,000 shares 

C: 1,000 shares 

Show the allocation of liability of the underwriters.