A proposal for a new 1-cent tax increase to support cancer research is to appear on the ballot in one county’s next election. The residents in Hangzhou and Chengdu, two cities in China, were questioned as to their level of support. In Hangzhou a recent survey of 450 residents showed that 352 people supported the proposal, 18 were undecided, and the remainder were opposed to the new proposal. In Chengdu, the results of a random sample of 400 residents found that 326 people supported the tax, 32 were opposed, and the remainder were undecided. Estimate the difference in the percentages of residents from these two cities who support this proposal. Use a 95% confidence level.