1, 4% of the interest on 50,000 car loans is 50,000 times 0.04%, which equals 200, and the monthly interest is 200 yuan.

2. Fifty thousand years is 36 months, fifty thousand divided by 36 is about 1389, and the monthly principal payable is 1389 yuan.

3, the monthly principal plus interest, a month also want to pay 1500.