content area top Part 1 In a certain year the population of a country reached 321 million. The overall birth rate was 13.5 births per 1000, and the overall death rate was 8.3 deaths per 1000. Complete parts (a) through (d) below. Question content area bottom Part 1 a. Approximately how many births were there in the country in that year? There were 4,333,500 births in the country. (Type an integer or a decimal.) Part 2 b. About how many deaths were there in the country in that year? There were 2,664,300 deaths in the country. (Type an integer or a decimal.) Part 3 c. Based on births and deaths alone (that is, not counting immigration), about how much did the population increase during that year? Based on births and deaths alone, the population rose by 1,669,200 people during that year. (Type an integer or a decimal.) Part 4 d. Suppose that during that year the population actually increased by 2.6 million. Based on this fact and your results from part (c), estimate how many people immigrated to the country. What proportion of the overall population growth was due to immigration? Estimate how many people immigrated to the country. There were enter your response here immigrants. (Type an integer or a decimal.)