Carl Icahn Said to Send Letter to Apple CEO Cook

Billionaire investor Carl Icahn is once again engaging with Apple and its CEO, Tim Cook. He announced via Twitter that he plans to send a letter to Cook, which he described as 'interesting.' Icahn has a history of challenging Apple over its cash reserves. He also highlighted that since he revealed his investment in Apple a year ago, the company's shares have risen by over 50%. Icahn's total stake in Apple is just under 1%.

What action did Carl Icahn announce he would take regarding Tim Cook?

What previous issue did Icahn have with Apple?

What did Icahn refer to in his tweet about his stake in Apple?

What was the percentage increase in Apple's shares since Icahn disclosed his stake?

What is the total stake percentage that Icahn holds in Apple?