Let π1 be the line that passes through π1 = (2,9,8) and π2 = (1,9,9) and let π2 be the line that passes through π3 = (1,1,1) and π4 = (2,5,4) a) Find out if the two lines intersect and if so, find the intersection point of π1 and π2 b) Let π be the sphere whose center is the intersection of π1 and π2 and whose radius is π = 4. Write the implicit representation of the sphere. c) Find the implicit representation of the two planes π1 and π2 that are tangent to the sphere π at the points of intersections of π1 towards π2 and π2 towards π4 , respectively.
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