Answer:
long duct: 1.0 and 0.424
Hemisphere 1.0 ; 0.125; 0.5
Step-by-step explanation:
For a long duct:
By inspection,

Calculating by reciprocity,

Hemisphere:
By reciprocity gives = 0.125
using the summation rule:

However, because this is a hemisphere, the value will be= 0.5 * 1
= 0.5