Question 7 (1 point) What is a combination equal to (15) 6 16 7 15 8 16 (b) 6 + (15) Question 8 (1 point) Using the letters ABCDEFGHI, how many 5-letter words can be formed if it must start with a vowel and letters can't repeat. JUST PUT THE ANSWER (#), DO NOT SHOW ANY WORK. Question 9 (1 point) Using all of the digits, how many 5-digit numbers are there that are odd if digits can repeat? JUST PUT THE ANSWER (#), DO NOT SHOW ANY WORK.