Two independent, completely accidental scientific discoveries will be required to plan a space elevator. The first, Negative Gravity, we believe will take an average of 10 years to happen. The second, Monofilament Cables, we believe will take an average of 6 years to take place. c) What is the expected time until we can plan a space elevator, because both discoveries will have taken place? (Hint: remember the tail probability formula E(T) = $. (1 – F(T)dT.)