For questions 12-13, download the Excel file, “Data: Calculating Ruil Population Size,” containing the number of ruil trees in the population at present (time = 0).

Directions: For questions 12-13, download the Excel file, “Data: Calculating Ruil Population Size,” containing the number of ruil trees in the population at present (time = 0). Assume a per capita rate of change (r) equal to the per capita rate of change you estimated for a population of ruil trees when the novel symbiont is present and the soil moisture is 24%. Use Excel for calculations, modeling, and graphing. Round all calculated values to the nearest whole number. For example, if you calculate the value as 3.8215, round to 4. 12. How many years will it take for the ruil population to return to its population size prior to the 2017 wildfires if the novel symbiont is present and the soil moisture is 24%? The population size prior to the 2017 wildfires was 42,192 trees, and the current population size is 20,985 trees. In other words, which year in the spreadsheet will the predicted number of ruil trees rise above 42,192? Number of years required for the population to exceed 42,192 trees =