Need Help on a transmission line problem 1!

beidog

1. The problem statement, all variables and given/known data



2. Relevant equations

c. Which transmission line does it have standing waves?

3. The attempt at a solution

IS this problem just calculate (Zin1 for the 10.3 line with the Z1 ) and (Zin2 for the .25 with Zl) and then
Zin = Zin1//Zin2???