A squad is tasked to assemble a truck load out plan. The crew leader is given 12 members to work with, 25% of all unit members get truck driving training.

1. What is the probability a crew leader will have at least 7 truck drivers
2. What is the probability the leader will have exactly 7 truck drivers on the crew
3. What is the probability the leader will have less than 7 truck drivers on the crew

Assume a .25 chance of having a certified truck driver.