can someone answer B,C,D,E questions pleaseee on the photo I provided

Jan 1 Recruited into study (beginning of follow up) Jan 11 developed Figure 1: This person was at risk for 10 days, contributing 10 persondays (one person being at risk for 10 days) Jan 1 Recruited into study (beginning offollow up) 0 Jan 6 developed symptoms Figure 2: Each of these two individuals was at risk for 5 days; each contributed 5 persondays. Together, they contributed 10 persor'rdays b. Participant 4 first showed symptoms of flu on Jan 21 and remained symptomatic thereafter. What was this person's share of time at risk for flu? (1) c. Participants 6, 7, 8, 9, 10: Did not develop symptoms of flu at any time during the month. What was their total time at risk for flu during January 1 through January 31, 2020? Explain your answer. (2) d. What was the total person-time at risk for flu for the 10 participants during January 1 through January 31? (2) e. (Extra-credit) Using the definition of incidence rate as described in slide 15 of module 3,_compute the incidence rate of flu symptoms. Show the steps (numerator, denominator, multiplier) and express in appropriate unit. Interpret this incidence rate in your own words. (2)