Explain how "Test 1 Percentage" and "Top Achievers" are determined based on the provided spreadsheet data.

Based on the provided spreadsheet:

1. Test 1 Percentage: The "TEST 1 PERCENTAGE" is derived directly from the "TEST 1 MARK". It appears that the numerical value of the mark is simply displayed with a percentage sign appended, rather than being calculated as a percentage out of the "TOTAL POSSIBLE MARK" of 110.

   Example: For Godfrey, the "TEST 1 MARK" is 95, and the "TEST 1 PERCENTAGE" is 95%.

2. Top Achievers: The "TOP ACHIEVERS" column displays the student's name if their "TEST 1 PERCENTAGE" (which is their mark) is 90% or higher. If the percentage is below 90%, it displays "NOT THERE YET".

   Example:

   • Godfrey has 95%, which is $\ge 90\%$, so "GODFREY" is displayed.
   • Mandla has 75%, which is $< 90\%$, so "NOT THERE YET" is displayed.
   • Nkhesani has 91%, which is $\ge 90\%$, so "NKHESANI" is displayed.