Question: A market is supplied competitively by two groups of firms. There are 50 low-cost firms, each with cost curve \(C_{l}(q)=350+2 q+q^{2}\), while all other firms (including potential new entrants) are high-cost firms and have a cost curve \(C_{h}(q)=400+2 q+q^{2} .\) Market demand is \(Q=2500-10 p\)

1. Draw the long-sun market supply curve (just a general shape, no need to derive equational form)
2. If none of the high-cost firms makes a positive profit, how many firms are there in the market?
3. How much profit do the low-cost firms make?

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