The density function p(t) for the length of the larval stage, in days, for a breed of insect is given in Figure 7.5. What fraction of these insects are in the larval stage for between 10 and 12 days? For less than 8 days? For more than 12 days? In which one-day interval is the length of a larval stage most likely to fall?

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fraction of insects per day of larval stage 0.15 0.12 0.09 0.06 0.03 4 8 12 Figure 7.5 16 20 t (days)