Problem 3Consider the following definitions for sets ofcharacters:•Digits ={0,1,2,3,4,5,6,7,8,9}•Letters ={a, b, c, d, e,f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y,z}•Special characters ={?,&,$,#}Compute the number of passwordsthat satisfy the given constraints
.(i) Strings of length 7. Characters can be special characters,digits, or letters ,with no repeated characters
.(ii) Strings of length 6. Characters can be special characters,digits, or letters ,with no repeated characters. The firstcharacter can not be a special char-acter.
