A check digit is one method to validate a 5-digit number. The check digit for a 5-digit number is calculated as follows: - Each digit is multiplied by its position (the first digit on the left is in position 1). - The result of each multiplication is totalled. - MOD (Total, 11) is used to calculate the check digit. - If the result of the MOD function is 10, the check digit is ' \(X\) '. For example: The calculation of the check digit for the 5-digit number 30475 is as follows: Multiply each digit by its position and total the results: ``` (3 * 1) + (0 * 2) + (4 * 3) + (7 * 4) + (5 * 5) = 68 ``` Calculate the check digit with MOD (Total, 11) ``` MOD(68, 11) = 2 ``` The check digit for 30475 is 2 This pseudocode algorithm should calculate and output the check digit of a 5-digit number: ``` DECLARE Total : INTEGER DECLARE Digit : INTEGER DECLARE CheckDigit : CHAR Total ← 0 FOR Count ← 1 TO 10 OUTPUT "Please enter digit ", Count INPUT Digit Total ← Total + (Digit / Count) NEXT Count CheckDigit ← MOD(Total, 11) IF CheckDigit = 10 THEN OUTPUT "The check digit is X" ELSE OUTPUT "The check digit is ", Count ENDIF ``` (a) Identify the line numbers of the four errors in the pseudocode and suggest a correction for each error. Error 1 line number \_\_\_\_ Correction \_\_\_\_ \_\_\_\_ Error 2 line number \_\_\_\_ Correction \_\_\_\_ \_\_\_\_ Error 3 line number \_\_\_\_ Correction \_\_\_\_ \_\_\_\_ Error 4 line number \_\_\_\_ Correction \_\_\_\_ \_\_\_\_ (b) Explain how you could modify the pseudocode to validate that each input is a single digit. Any code must be fully explained. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [3] (c) The 5-digit number needs to be entered as a single input. Describe one verification method that could be applied to the input of the 5-digit number. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_

2025 - O/N - 0478/21 | Q6

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A check digit is one method to validate a 5-digit number....