Sql query with case and coalesce based on column name/ not column value

DECLARE @tablea TABLE(
	ID INT, [Name] VARCHAR(30),
	YTDLVL1 INT, YTDLVL2 INT, 
	YTDLVL3 INT, QLVL1MT INT, 
	QLVL1SC INT, QLVL1SP INT, 
	QLVL2MT INT, QLVL2SC INT, 
	QLVL2SP INT, QLVL2EN INT)

INSERT INTO @tablea (ID, [Name], YTDLVL1, YTDLVL2, YTDLVL3, QLVL1MT, QLVL1SC, QLVL1SP, QLVL2MT, QLVL2SC, QLVL2SP, QLVL2EN)
VALUES(1, 'John', 100, 60, 90, 85, NULL, NULL, NULL, NULL, 20, NULL),
(1, 'John', 100, 60, 90, 79, NULL, NULL, NULL, NULL, 90, NULL),
(1, 'John', 100, 60, 90, NULL, NULL, 55, NULL, 66, NULL, NULL)


SELECT ID, [NAME], CASE
		WHEN Program Like '%[1]%' THEN 'LVL1'
		WHEN Program Like '%[2]%' THEN 'LVL2'
		WHEN Program Like '%[3]%' THEN 'LVL3'
		END AS Program,
	 CASE
		WHEN Program Like 'YTD%' THEN 'YTD'
		WHEN Program Like '%MT' THEN 'MT'
		WHEN Program Like '%SP' THEN 'SP'
		WHEN Program Like '%SC' THEN 'SC'
		END AS Category, Marks
FROM (
	SELECT *
	FROM @tablea 
	) AS a
UNPIVOT (Marks FOR Program IN (YTDLVL1, YTDLVL2, YTDLVL3, QLVL1MT, QLVL1SC, QLVL1SP, QLVL2MT, QLVL2SC, QLVL2SP, QLVL2EN)) AS unpvt

ID	NAME	Program	Category	Marks
1	John	LVL1	YTD			100
1	John	LVL2	YTD			60
1	John	LVL3	YTD			90
1	John	LVL1	MT			85
1	John	LVL2	SP			20
1	John	LVL1	YTD			100
1	John	LVL2	YTD			60
1	John	LVL3	YTD			90
1	John	LVL1	MT			79
1	John	LVL2	SP			90
1	John	LVL1	YTD			100
1	John	LVL2	YTD			60
1	John	LVL3	YTD			90
1	John	LVL1	SP			55
1	John	LVL2	SC			66