The first six rows of Pascal's triangle are shown. David decided to add the numbers in each ron. He found the sum of the first row was 1.t the second row was 2. and the sum of the third row was 4 1 1 1 1 2 1 3 3 1 6 4 1 10 10 5 1 1 1 1 5 Based on the pattern in the triangle, what is the sum of the numbers in the seventh row what is the sum of the seventh row