(a).

Lymphocytes Subset			Normal range for age 7-17
	%	[x10 (6)L]	%	[x10 (6)L]
Total T cells	38	802	66-76	1400-2000
Total B cells	0	7	12-22	300-500
Th cells (CD4)	10	176	33-41	700-1000
Ts cells (CD8)	24	440	27-35	600-900
NK cells	59	1428	9-16	200-600