https://img849.imageshack.us/img849/9281/7ir.gif
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https://img841.imageshack.us/img841/9325/8oqc.gif
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https://img819.imageshack.us/img819/3096/ovuc.gif
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https://img855.imageshack.us/img855/5751/2ax.gif
Cvp:
1)4
2)4
3)9+3√3
4)66