Crude oil is to be delivered from an offshore production platform at a constant flow rate of 15000 bbl/day to an onshore tank-farm facility 2 Km away

Crude oil is to be delivered from an offshore production platform at a constant flow rate of 15000 bbl/day to an onshore tank-farm facility 2 Km away.
What is the crude oil flow rate in m3/s?           
If a pipeline is to be installed to transport the crude oil, calculate the diameter of the pipeline (in inch). Assume maximum allowed velocity of 15 ft/s.      
If the oil is to be store for two weeks, what would be the minimum size (in litres) of a storage tank require to avoid spillage?    
If a 40 million litres storage tank is to be installed to increase the tank-farm storage capacity, calculate the duration (in hours) it would take the tank to full. The crude oil flow rate is as stated above