I could use some help here

Newton's second lawinstruction activecalculating mass using a free-body diagram with multipleforcestwo horses, thunder and misty, are accelerating awagon 1.3 m/s2. the force of friction is 75 n. thunderis pulling with a force of 1,000 n, while misty is pullingwith a force of 800 n. the force of gravity is 14,700 nand the normal force is 14.700 n. what is the mass ofthe wagon? round the answer to the nearest wholenumberf = 14,700 nf = 800 nf = 1,000 nf = 75 ndone