Question

I want ans for 2 and 3 question

Answer 1

this is the answers u asked me

Answer 2

Hey friend, Harish here.
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Here is your answer
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Q2) Yes, there will be a friction force between the water and the boat. These type of friction force is known as the viscous drag, or viscous force. 

As the friction is always an opposing force, it definitely affects the movement of the boat in water.

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Q3) No . There is no surface in this world which has zero friction because , no surface has a perfect smooth surface. But ice is assumed to have approximately zero friction force. 
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Hope my answer is  helpful to you.