Morgan Stanley graduate internship

Morgan Stanley came to campus for graduate Internship . 1 hour test around 45 questions multiple choice.
I donot remember the options.
Some relatively easy some require calculation.
Here are some of the questions :

1. y'' + y' = e^-t find y.

2. X^4 = k*logx. Find k if the above equation has only one solution.

3. Which among "

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