a total of 12 thousand passengers normally ride the green line of the mbta during the morning rush hour . the token prices for a ride are $1.05 for junior and high school students $2.10 for adults and &1.05 for senior citizens and the revenue from these riders is $23,100. If the token price were raised to $1.25 for junior and high school students and $2.40 for adults and the senior citizen price were unchanged the expected revenue from these would be $26,340. How many riders in each category normally ride the green line durning the morning rush hour?