Can I please get some help with the following three questions?

Calculate the simple interest earned. Round to the nearest cent. P=$3400,r=5.7%,t=6months $ Need Help? Use the formula A=P(1+rt) to calculate the maturity value of the simple interest loan. (Round your answer to two decimal places.) P=$16,000,r=8.3%,t=8months $ Use the formula A=P(1+rt ) to calculate the maturity value of the simple interest loan. (Round your answer to two decimal places.) P=$2800,r=9.4%,t=5months $