16 students of Dravid International School (DIS) are chosen to participate in national level 5-a-side cricket tournament. Names of the students are Ajay, Binod, Charls, Dev, Elan, Firoz, Girish, Hari, Imran, John, Kedar, Laxman, Madhav, Ned, Ojha, Peush. These 16 students are a mix of R ^ (th) graders, 9th graders and 10th graders. The school principal has instructed the coach that each team he selects for a match must contain exactly two 8 ^ (th) graders, exactly two 9 ^ (th) graders and one 10th grader.

We also know the following

a) Girish is a 9 ^ (th) grader

b) Binod and Imran are both 8th graders

c) There are only three 1a ^ (th) grade students among the 16

DIS takes part in eight matches. Here are the teams for each of the match

Match 1

Ajay

Charls

girish

Imran

Laxman

Match 2

Firoz

Imran

Kedar

Laxman

Madhav

Match 3

Charis

Elan

Firoz

Girish

Kedar

Match 4

Ajay

Binod

Firoz

Girish

John

Match 5

Ajay

Dev

John

Kedar

Peush

Match 6

Charls

Firoz

Girish

Laxman

Ojha

Match 7

Binod

Imran

Laxman

Ned

Ojha

Match 8

Dev

Hari

John

Kedar

Madhav

questions
1) how many 9th graders have their name starting with a vowel ( a,e,I,o,u)?
2)who is the 10th grader who played in 6th match ?
3)who are the 9 th graders who played in the 8th match?
4) how many 8th graders are there among the 16 students?