Suppose there are two producers in the producrs in the market for a commodity and their supply functions are follows:
`Q_(1)` = - 30 + 3p for any price more than or equal to 10 and `Q_(1)` = 0 at any price less than 10.
`Q_(2)` = - 20 +2p for any price more than or equal to 10, and `Q_(2) = 0` at any price less than 10.
Find out the market supply function .