A：They are going to come up with a good idea
B：They are going to wake up Bob.
C：They are going to make Bob happier.
从小到大，一路走来，收获了许多甜蜜的回忆。甜蜜的回忆如花，芬芳四溢，令人迷醉。它如桃花，绽放在三月油墨的田野上；____，____；____，____；它如梅花，绽放在腊月雪白的屋舍旁。
已知单调递增的等比数列{an}满足：a2+a3+a4=28，且a3+2是a2，a4的等差中项．
（Ⅰ）求数列{an}的通项公式；
（Ⅱ）若bn=an+log12an，Sn=b1+b2+…+bn，求Sn．
