Orovada Street and Wyoming Street run parallel as shown in the figure to the right. A traveler standing at the intersection of Green Avenue and Wyoming Street wants to walk to the State Building. The traveler knows that the State building is 8 blocks from the intersection of Orovada Street and Washington Avenue. She also knows that the intersection of Orovada Street and Washington Avenue is 5 blocks from the intersection of Wyoming Street and Washington Avenue. If the traveler had to walk 4 blocks to get from the intersection of Wyoming Street and Green Avenue to the intersection of Orovada Street and Green Avenue, how much farther must she walk to reach the State Building?

a. 10.4 blocks
b. 8 blocks
c. 6.4 blocks
d.2.5 blocks