CamBroOkaii2980 CamBroOkaii2980 07-03-2024 Mathematics contestada Identify the rules used to calculate the number of strings of lowercase letters of length four or less, not counting the empty stringa) 26⁴ + 26³ + 26² + 26b) 26⁴ + 26³ + 26²c) 26⁴ + 26³d) 26⁴