7.29: List the first few terms of the summation, and you should recognize it. (I kept my explanation short)
7.30: Cases to consider: What happens if the first "2" in the summation of $F_n$ is the first term (an example of this is 2+2+1+2+1)? What if it's the second (example of this is 1+2+1+2+1)? What if you see the first "2" term at the very end, and all the rest are 1's (an example is 1+1+1+2)? What summation of $F_n$ is not considered?