help please

'ou just got a new job and are offered several contracts from which to choose. Which is the best deal assuming a positive rate of interest? Payment of $4 million over four years, paid in equal installments at the beginning of each year. Payment of $4 million over four years, paid in installments at the beginning of each year, but growing by two percent per year. Payment of $4 million over four years, paid in equal installments at the end of each year. Payment of $4 million over four years, paid in installments at the end of each year, but growing by two percent per year. Keep up the great work