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- , ./ ;
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() - - , /, 1000 /.
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.1 .
.1.
.
W, ./(× /) | £2 | 2 < £ 4 | 4 < £ 8 | 8 < £ 14 | 14 < £ 24 | 24 < £ 40 | 40 < £ 65 | 65 < £ 100 | 100 < £ 160 | 160 < £ 250 | 250 < £ 380 | 380 < £ 570 | 570 < £ 850 | 850< |
.2 , W, ./(× /), .1.
:
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(.3)
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(.4)
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(.5)
Δ - 2 1 , . , - , - 1 .
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.3 , . .