The following practice problem has been generated for you:Calculate the explicit formula, term number 13, and the sum of the first 13 terms for the following series:
3,15,75,375,1875,9375
ncG1vNJzZmivp6x7rq3ToZqepJWXv6rA2GeaqKVfqLKywcSnmp6Zl2O9qbyeqaN2f5WjsrOt055iiaqRmMGqr8Rkh6unkqGyrg%3D%3D