Which expression fits this description? • The expression is the sum of two terms.
• The first term is the product of 2 and a.
• The second term is the quotient of b and 4.
(2+a) +
2a + (6 - 4)
(2 + a) + (6 - 4)
2a+

-- Start a list.
-- At the beginning of the list, write zero. 
-- Next on the list, write ' 1 '.
-- Now you have the beginning of the Fibonacci series.
-- Whenever you want to add a new term to the list, sum up
     the last two terms on the list.  Their sum is the new term.