Answer
S1 Quantity Supplied
At Price 3 = 15
At Price 2 = 10
At Price 1 = 5
Change in Quantity Supplied
At Price 3 = 11
At Price 2 = 8
At Price 1 = 5
Work Step by Step
For S1 Quantity Supplied, refer graph
For Change in Quantity Supplied,
At Price 3 = 15-4 = 11
At Price 2 = 10-2 = 8
At Price 1 = 5-0 = 5