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Find the values of `s_1, s_2,s_3 and s_4` for each of the following equations .
`x^4-16x^3+86x^2-176x+105=0`
`"Hint" : s_1=sum_(i=1)^(4) alpha_i,s_2=sum_(lleilejle4) alpha_ialphai, s_3=sum_(lleilejlekle4) alpha_ialpha_jalpha_k, s_4=alpha_1alpha_2alpha_3alpha_4`

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Given equation is
`x^4-16x^3+86x^2-176x+105=0`
We know that `s_1 =-(a_1)/(a_0) =9160/(1)=16`
`s_2=(a_2)/(a_0)=(86)/(1) =86 `
`s_3 =-(a_3)/(a_0)=(176)/(1)=176 `
`s_4=(a_4)/(a_0)=(105)/(1)=105`
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