On the diagram above, label the following regarding the immu…

On the diаgrаm аbоve, label the fоllоwing regarding the immune response and antibody concentrations found at each. Alt text: Line graph showing changes in serum antibody concentration over 7 weeks following two exposures to an antigen. The y-axis is labeled "Serum titer of antibodies". The x-axis is labeled "Time (weeks)" and ranges from 0 to 7 weeks. Two antibody response curves are shown: A blue dashed line shows that after the first antigen exposure at approximately week 1 (labeled A), IgM rises rapidly to a small peak around week 1.5, then declines to near baseline by about week 2.5. Following the second antigen exposure at approximately week 4.5 (labeled B), it shows little or no increase and remains close to baseline through week 7. A solid red line shows that after the first exposure, it rises more slowly, reaching a modest peak around weeks 2.5–3, then gradually declines but remains above baseline. Following the second exposure at about week 4.5, it increases rapidly and steeply, reaching a much larger peak around week 6, before beginning to decline slightly by week 7.