Q1: Find the name and age of the oldest sailor

Q2: Find the names of sailors who are older than the oldest sailor
sailer with a rating of 3.

Q3: Find the SIDs of suppliers who supply a red part or a green part.

Q4: For each part, find the sname of the supplier who charges the
most for that part

Q5: What's the minimum price of all green parts? 

Q6: Find sailors with better rating than sailor 'jones' 

Q7a: Find the age of the youngest sailor who is eligible to vote for each
rating level that has less than two sailors

Q7b: Find the age of the youngest sailor who is eligible to vote for each
rating level that has less than two sailors [and that doesn't have any sailors over 60].