On April 1, 2022, an investor bought 2500 shares of PT Telkom Tbk. With a price of IDR 4550 per share. The investor gets a margin of 65% with a maintenance margin of 30%. Try to determine what the share price of PT Telkom Tbk is. which causes investors to be hit by a margin call. And how much margin debt must be borne by investors. Explain at least 2 factors that cause price changes that cause investors to get margin calls.