Consider the following observations of a series:

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.$)$

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.$)$