pls answer fast, i will rate!

Suppose you sell short Tesla which is currently trading at $300 per share. You put $30,000 as cash into your brokerage account with an initial margin of 50%. The maintenance margin is 35%. a}How many shares of Tesia can you sell short? (2 pts) b)How far can the stock price increase before you get a margin call? (8 pts) c)Assume Tesla pays a dividend of S10 per share after you sell it short. At what price, will you get a margin call? (5 pts)