In the paragraph below identify which sentence does not follow...

In the paragraph below identify which sentence does not follow paragraph unity. Identify the mismatching sentence and mark the number (1/2/3/4/5) of the particular sentence which is erroneous.

(1)Within Hong Kong, a number of factors help the development of trade.(2) The average employee works harder than his counterpart in some other countries.(3)& There are highly developed banking, insurance and shipping systems that help the local manufacturer and exporter.(4) A particular obstacle which local industrialists have to overcome or learn to live with is the shortage of land and the high price that must be paid for suitable manufacturing sites.(5) Income tax, too, is more favorable than in some of the countries with which Hong Kong must compete in the search for overseas markets.