(a) The Fibonacci numbers are the numbers in the following
integer sequence, called the Fibonacci sequence, and are
characterised by the fact that every number after the first two is
the sum of the two preceding ones: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34,
55, 89, 114, … etc. By definition, the first two numbers in the
Fibonacci sequence are 0 and 1, and each subsequent number is the
sum of the previous two. We define Fib(0)=0,...