<image>Yang Hui was a renowned mathematician and educator of the Southern Song Dynasty in China. The following image is from Yang Hui's book "Detailed Solutions to the Nine Chapters on the Mathematical Art" written in 1261 AD. The image depicts the "Yang Hui's Triangle" (Pascal's Triangle). There are many patterns within the triangle. Please observe carefully and answer the following questions: 

1. The image shows seven rows of numbers. According to the pattern, the 3rd number from the right in the 8th row is ____________;
2. Using the method of incomplete induction, explore and find the sum of all numbers in the nth row, which is ________________.