Ten helicopters are scheduled to go on a hazardous deep rescue mission with a staging stop. If there are six or more fully mission capable helicopters at the staging stop the mission will continue, otherwise it will be canceled. If the reliability of each helicopter is 0.7, and independent of the others, what is the probability the mission will be canceled? How many helicopters do you need to have at least a 99% chance of carrying out the mission? Briefly comment on the assumption of independence between helicopter failures and how it affects your analyses.