3. Strands of copper wire from a manufacturer are analyzed for strength and conductivity. The results from 100 strands are as follows: High Strength Low Strength High Conductivity 68 5 Low Conductivity 20 7 a. If a strand is randomly chosen, what is the probability that its conductivity is high and strength is high? (5 points) b. If a strand is randomly chosen, what is the probability that its conductivity is low or strength is low? (5 points) c. Consider the event that a strand has low conductivity and the event that the strand has low strength. Are these two events mutually exclusive? (5 points)