3-sisters Pty Ltd, Mountain Tours Pty Ltd and Valley Tours Pty Ltd are companies providing a range of similar tourist services in the Blue Mountains area. They have approximately equal market shares. Consider any trade practices law implications of the following conduct: (i) The three companies charge identical prices. (ii) 3-sisters decides to increase its prices to match that of Mountain Tours (in) The three companies agree to adopt a uniform refund policy (iv) The proprietors of the three companies decide to adopt a plan under which each company will concentrate on a particular market segment. (v) When a new competitor commences operations 3- sister lowers its prices, below that of the new entrant Advise 3-sisters and the ACCC