When a swimmer pushes threw water to swim they are propelled forward because of the water resistance against the hand and feet.
        
                    
             
        
        
        
10 would be the answer for number 3
        
             
        
        
        
<span> is the volume of fluid which passes per unit time; usually represented by the symbol Q (sometimes V̇).</span>
        
             
        
        
        
It shows that the airplane covers equal distance in equal time interval, that's it has a straight line from the origin.
The plane is moving at uniform speed. 
        
             
        
        
        
I can help you with 5. 5 is a displacement-time graph. 
At A it is moving in a positive direction and speed is constant. 
At B it is stationary or at rest. 
At C, movement is negative and it is decreasing or decelerating 
At D, it’s a general downwards movement in the negative direction that can be described as overall constant