There is a relationship between a perceived corruption and human development in a country that can be modeled by H(x)=0.3+0.28lnx. In this formula, x represents the Corruption Perception Index, where 1 is very corrupt and 10 is least corrupt. The output gives the Human Development Index, which is between 0.1 and 1 with 1 being the best for for human development.

a) For country A, x=7. Evaluate H(7) and interpret the result.

b) The Human Development Index is 0.66 for country B. Find the Corruption Perception Index for country B.