Data from a borehole log with collar elevation at 590 mRL are given below. Composite grade is calculated using cores of 5 m above and below the reference bench at 580 mRL. The composite grade, in %, is ______ (rounded off to 1 decimal place)

Sequence of cores (top to bottom)	Core length (m)	Grade (%)
1	3.0	40
2	3.0	42
3	2.0	41
4	3.0	43
5	2.0	42
6	3.0	41
7	3.0	44