(a) 

1. The width of all lines drawn on the football field is 12 cm, i.e., 5 inches. 

2. A penalty arc is an arc of circle from the penalty mark outside the penalty area. It is important because the ball is kept in this penalty arc to take the penalty kicks. 

3. The position of the ball and players during penalty kick is as follows: 

1. Ball: Placed on the penalty mark. 

2. Kicker: Properly identified while taking the penalty kick. 

3. Defending Goal Keeper: Remains on his goal line, facing the kicker, between goalposts until the ball has been kicked. 

4. Other Players: Atleast 9.15 m away from penalty mark. 

(b) 

1. The ball comes in play again after the goal kick made by the player of the opposing team. The kicker does not play the ball a second time until it has touched another player. 

2. The three situations when the kick-off is applied are: 

1. During the start of the game. 

2. At the start of each period of extra time, where applicable. 

3. Just after a goal has been scored. 

3. The three offences for which yellow card is shown to a player are: 

1. Striking an opponent. 

2. For playing a dangerous illegal play. 

3. Swearing at an official amongst others. 

(c) 

1. The four situations when a player is not offside when he receives the ball are: 

1. Directly from a goal kick. 

2. Directly from a corner-kick. 

3. Directly from a throw-in. 

4. Nearer to his opponents’ goal line than both the ball and the second last opponent.