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- Find the point on the line y = 3x + 4 that is closest to the origin. (x,y)=a)Find an equation of the line tangent to the graph of y = x2 + 1 at the point (2, 5)b) Find an equation of the line perpendicular to the graph of y = x2 + 1 at (2, 5)c) Where is the line tangent to the graph of y = x2 + 1 horizontalb. Find the equation of the line normal to the curve at the point (-2,1). c. Find the coordinates of the two points on the curve where the line tangent to the curve is vertical.