You can sell 130 pet chias per week if they are marked at $1 sach, but only 120 each week if they are marked at $2/chia. Your chia supplier is prepared to sell you to chiase week if they are marked at $1 per chia, and 50 each week if they are marked at $2 per chia (a) Write down the associated linear demand and supply functions, demand function supply function ale) = (b) At what price in dollars) should the chias be marked so that there is neither a surplus nor a shortage of chiss