E. coli chromosomes

[cynthiaLG]

Suppose the E. coli synthesizes DNA at a rate of 100,000 nucleotides per minute and takes 40 minutes to replicate its chromosomes.
(1)How many base pairs are present in the entire E. coli chromosomes?
(2)What is the physical length of the chromosome in its helical configuration, that is, what is the circumference of the circular chromosome?