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Consider the following observations of a series: 3 Year 1 98 Year 2 118 Year 3 158 Year 4 168 & 00:55:53 a. Calculate the growth rates for Year 1-Year 2. Year 2-Year 3, and Year 3-Year 4. (Round your answers to 4 decimal places.) Year 1-Year 2 Year 2-Year 3 Year 3-Year 4 Growth rates b. Calculate the average growth rate. (Enter your answer as a percentage, rounded to 2 decimal places, using intermediate calculations rounded to at least 4 decimal places.) Average growth rate %