LinkedIn Patches 21 answer, 7 April 2026: a 1 by 2 rectangle at row 1, column 1; a 2 by 2 rectangle at row 1, column 5; a 3 by 3 rectangle at row 1, column 2; a 2 by 1 rectangle at row 3, column 5; a 1 by 2 rectangle at row 3, column 1; a 3 by 1 rectangle at row 4, column 2; a 4 by 2 rectangle at row 5, column 1; a 2 by 3 rectangle at row 4, column 5. Answered 07:00 UTC