题目如下：
The competitive market price of rice in Thainam is $150 per ton. At this price, farmers are currently supplying a total of 30 million tons per annum.
The Thainam Farmers Association is lobbying for the introduction of a price floor at 10% above the current market price in order to raise the welfare of local farmers.
a. Under what circumstances will it be more likely that the rice farmers will be better off with the proposed price floor ?
b. If the price elasticity of demand for rice e = -2.5 and the price elasticity of supply h = 0.4, how will the introduction of the price floor affect the rice farmers’ welfare?
c. If the government provides a price support of 10% above the market price by buying up any excess supply, what is the estimated government budget for this support scheme?
What is the deadweight social loss of this action?

对于问题C，请问如何计算ZF的预算？以及社会的总损失该怎么看呀？谢谢大家了！