Check employee code if it is valid

Question

Write a function “isValidEmpCodeLetter” to check the last letter of the employee code is valid.
Apply the following rules in sequence to check the last letter.
• Multiply each of the numbers with 2, 7, 6, 5, 4, 3 in sequence.
• Sum up the multiplication results
• Match the last digit of the sum with the letter in the table.
• Depending on the first letter, the employee code must have the corresponding letter in the
table.

The function returns a true if the format is right, else it returns false.

Answer 1

Is anyone know what should be done?