This pseudocode should allow 500 marks to be entered into the algorithm. If the mark is 80 or greater it is stored in an array for higher marks. If the mark is less than 80, but greater than or equal to 50 it is stored in an array for middle marks. The remaining marks are stored in an array for lower marks. The results from the algorithm are displayed at the end. 01 HighList ← 0 02 MidList ← 0 03 LowList ← 0 04 MarksEntry ← 0 05 REPEAT 06 INPUT Mark 07 IF Mark >= 80 08 THEN 09 Higher [HighList] ← MarksEntry 10 HighList ← HighList + 1 11 ELSE 12 IF Mark >= 50 13 THEN 14 Middle [MidList] ← Mark 15 MidList ← MidList 16 ELSE 17 Lower [HighList] ← Mark 18 LowList ← LowList + 1 19 ENDIF 20 ENDIF 21 MarksEntry ← MarksEntry + 1 22 NEXT MarksEntry = 500 23 OUTPUT "You entered ", HighList, " higher marks" 24 OUTPUT "You entered ", MidList, " middle marks" 25 OUTPUT "You entered ", LowList, " lower marks"

1. (a)Identify the four errors in the pseudocode and suggest a correction for each error. Error 1 ........................................................................................................................................... Correction ..................................................................................................................................... Error 2 ........................................................................................................................................... Correction ..................................................................................................................................... Error 3 ........................................................................................................................................... Correction ..................................................................................................................................... Error 4 ........................................................................................................................................... Correction .....................................................................................................................................[4]
2. (b)The corrected algorithm needs to be changed so that any number of marks may be entered and the algorithm runs until the user tells it to stop. Write the new pseudocode statements that would be needed to achieve this and state where in the algorithm they would be placed.[4]