Jane, Robert, and Maria are passionate about sustainable agriculture and teamed up to establish an organic farm called "GreenHarvest." Jane and Robert transformed a picturesque piece of land, adding eco-friendly structures and landscaping. Maria meticulously curated the farm's ecosystem by selecting heirloom seeds and sustainable farming practices. Their combined efforts extended to hiring a team to oversee daily farming operations.

After a successful six months, Jane decided to step back from the farming business to devote more time to her environmental advocacy work. Robert and Maria agreed to continue running the farm under the same name. Oliver, who has been providing essential organic fertiliser to the farm since its inception, is unaware of Jane's departure and continued to supply fertiliser to the farm. Jane's departure resulted in a decrease in the farm's revenue. Oliver hadn't received payment for four months of supplies and was contemplating legal action against Jane, Robert, and Maria to recover the payments owed.

Meanwhile, tensions escalated between two farmhands, Harry and Roy leading to disputes over crop rotation responsibilities and who had authority over the daily work schedule.

On a particular day, a local restaurant owner named Sarah ordered a variety of organic produce for her farm-to-table menu. Amidst a disagreement on the farm, an unfortunate oversight occurred: a crucial batch of heirloom tomatoes was not included in the delivery due to a communication error. As a result, Sarah's restaurant faced challenges in serving its signature dishes, leading to customer dissatisfaction and a temporary drop in business.

Briefly answer the following questions with reference to relevant law that may apply to these facts.

1. Explain the type of business structure Jane, Robert, and Maria have formed and advise Maria who she can sue for the debt.

2. Advise Sarah if the owners of the farm and/or the farmhands are liable for the loss suffered by her