5.The most frequent systemic adverse event for the Johnson & Johnson (Ad26.COV2.S) COVID-19 vaccine was fever.Out of 402 participants for Cohort 1, fever was reported in 25 low-dose recipients and in 62 high-dose recipients. What is the probability of a Cohort 1 participant not reporting the adverse event of fever?

a)0.523

b)0.711

c)0.784

d)0.854

e)1.352