Scotland claim runner-up position; Hong Kong finish third and PNG qualify fourth.
PNG goes down by four wickets in second ODI after being restricted to modest 192/8.
Sharif and Evans share seven wickets to set up 148-run chase, which the batsmen achieve without much fuss.
Hong Kong to battle it out with Scotland, Kenya for the final two positions.
Matches are scheduled on June 12 and 13 in Edinburgh, following one-off ODI with England on June 10.
England schedule for the 2018 includes meetings with Pakistan, Australia and Scotland announces.