New radius when a moving electron's speed is halved and the field doubled

The same question, asked 2 times: 10 May 2023 S1, 10 May 2024 S1. Every wording below, oldest first.

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Question 1
10 May 2023 S1
22 $Electron of mass 'm' and charge 'q' is travelling with speed 'v' along a circular path of radius 'R' at right angles to a uniform magnetic field of intensity 'B'. If the speed of the electron is halved and the magnetic field is doubled, the resulting path would have radius$
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Question 2
10 May 2024 S1
13 $Electron of mass 'm' and charge 'q' is travelling with speed 'v' along a circular path of radius 'R', at right angles to a uniform magnetic field of intensity 'B'. If the speed of the electron is halved and the magnetic field is doubled, the resulting path would have radius$
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Question 1