Please answer these (a,b,). Explain well your calculations and steps! Thank you!!! A)Uses the scalar vector product to check if the three points J(-3, -4), K(5, 0) and L(2,6) are the vertices of a right angle. B)The speed of an aircraft is 415 km/h according to a 120° cap. A wind of 30 km/h blows at 45 °. C)Determines the velocity vector resulting from the aircraft in relation to the North. (Do this problem by algebraic representation.) 3. Determines a unit vector going in the opposite direction to the vector at = [-2,4].

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