1identify whether the series summation of 16 open parentheses 5 close parentheses to the i minus 1 power from 1 to infinity is a convergent or divergent geometric series and find the sum, if possible.

a this is a convergent geometric series. the sum cannot be found. (i think this)

b this is a divergent geometric series. the sum cannot be found.

c this is a convergent geometric series. the sum is –4.

d this is a divergent geometric series. the sum is –4.