pls help me solve those questions

show your work please

3. You borrow $250,000 in the form of a 3/1 hybrid ARM. The current annual COFI is 2.0% and the margin is 2.5%. What is the scheduled monthly payment for the first three years of your loan? 4. A retail tenant in The Mall at Short Hills pays $60 /sf plus overage to rent 1,500 square feet of space. If they earn $3,500,000 in total sales for the year and pay a percentage rent equal to 3% of chargeable sales as determined by their natural break point, what is the total amount of rent paid