A boy bought six guppies at the beginning of the month. One month later, the number of guppies in his tank had
doubled. His guppy population continued to grow in this
same manner.
a. Create a function g to model the growth of the boy's guppy population, where
g(n) is the number of guppies at the beginning of each month and n is the number
of months that have passed since he bought the six guppies.