Class acts
They are five high school graduating seniors who will leave a distinctive mark on their schools and communities across the region. James Sullivan got computers donated and networked at the Arlington Senior Center. Ramya Kumar raised more than $4,000 for a fishing village in India hit by last year's tsunami, only to wind up evacuated from her Lowell home in last month's flooding. Sean Doocey has been volunteering as an emergency medical technician in Harvard. Jesse Mattleman has worked tirelessly to break down social barriers at Belmont High School. And Soumya ``Ammu" Irivinti created an AIDS awareness website that caught the attention of the United Nations. 