the fight to be the world s most valuable company heats up, after apple announces new ai tools on its devices. and how long can you survive without your smartphone? we put a group of british teenagers to the test. hello and welcome to business today. i m arunoday mukharji. apple shares have surged to a record high, after it unveiled new ai tools. the tech giant is now valued at $3.18 trillion, just behind microsoft which remains the world s most valuable company. from new york, erin delmore has the details. investors have been waiting for months to see how apple would embrace ai and propelled many other tech trains to big market gains. on monday they got their answer, a partnership with openai. and chatgpt powers for cre plus some enhancements like proof reading and writing help and ai generated images and emojis. and even though the news came on monday, it was not until tuesday that the market rewarded apple s efforts. on monday apple shares actually closed down around 2%. b