A, B and C are partners sharing profits and losses in the ratio of 5:4:1. Calculate new profit-sharing ratio, sacrificing ratio and gaining ratio in each of the following cases:

Case 1. As per new agreement, C acquires 1/5^th share from A.                                                                                                            

Case 2. As per new agreement, C acquires 1/5^th share equally from A and B.                                                                         

Case 3. As per new agreement, A, B and C will share future profits and losses equally.                      

Case 4. As per new agreement, C acquires 1/10^th share of A and 1/2th share of B.