已知等差数列\(\{a_{n}\}\)中,\(a_{1}+a_{5}=16\),\(a_{6}=17.\)
\((1)\)求数列\(\{a_{n}\}\)的通项公式;
\((2)\{b_{n}\}\)为正项数列,若_____,求数列\(\{a_{n}\boldsymbol{⋅}b_{n}\}\)的前\(n\)项和\(T_{n}.\)
请在①\(\{b_{n}\}\)的前\(n\)项和为\(S_{n}\),且\(S_{1}=2\),\(b_{n+1}=S_{n}+2\),②\(\{b_{n}\}\)为等比数列,且\(b_{1}=2\),\(b_{2}+b_{3}\)是\(b_{3}\)与\(b_{4}\)的等差中项,③\(\{b_{n}\}\)为等比数列,且\(b_{6}=b_{1}b_{5}=64\),这三个条件中任选一个,补充在上面的横线上,并完成解答.