The tourist company PARACAS S.A, requests a personal loan of 10,000 soles, to open a new office in Pisco. At a bimonthly interest rate of 4% during half of the chosen period; the other half of the period the interest rate rises to 3% per month, you need to choose the time that they propose for the payment of said debt: 10 months, a year or 16 months. Find:

* The interest * The amount to be returned * Recommend the best option