Would you like help on all four questions? If so:
2. The value of the red digit is 800 million because of it's place value.
3. 4 is the digit in the ten millions place, not 9. Remember, seven digits must follow a number in the ten millions place.
4. In any whole number, the first digit has the greatest value, in this case it's one, with a value of 100 million.
5. A possible number is 9,432,763.