A carrom coin starts at position \(0\) on a number line. During a game, the coin is struck several times. A movement to the right is represented by a positive integer, while a movement to the left represented by a negative integer. The following movements are recorded: 
 
\(+​10​\), \(-​3​\), \(-​6​\), \(+​5​\)
 
Using the information, answer the following questions:
 
(a) What is the sum of \(-​6​\) and its additive inverse? ​​
 
(b) What is the coin's position after all the four movements? ​
 
(c) The player wants the coin to return to \(0\) after the four given movements. What should be the next movement? ​
 
(d) Two integers have a sum of ​−6​. If one of them is ​5​, find the other integer. ​