Assume that all such curves in below demonstrated graph are infinitely long straight lines. The supply curve which is perfectly price-elastic is: (1) supply curve S1. (2) supply curve S2. (3) supply curve S3. (4) supply curve S4. (5) supply curve S5.
![2243_Price Elasticity of Supply1.png](https://secure.tutorsglobe.com/CMSImages/2243_Price%20Elasticity%20of%20Supply1.png)
Hello guys I want your advice. Please recommend some views for above Economics problems.