Use the numeral 2,315,768,349 to answer the following:
1. The sum of the value of the largest digit and the value of the smallest digit is ____
2. The value of digit 1 is ____ times the value of digit 8.
Rearrange all the digits to make
a. The largest possible number
b. The smallest possible number
c. The largest possible odd number
d. The possible even number