Permutations and Combinations Q3: Passwords with Conditions

John needs to use a seven-character password to log into the network. Find the number of possible passwords, if repetitions of the characters of the password are not allowed and the passwords must satisfy the following conditions:

• Begin and end with any of the \(26\) alphabets assuming that the password is not case sensitive;

• Contains at least one of the ten digits \(0\) – \(9\).

Give your answer correct to \(3\) significant figures.[3]