98 chevy malibu ls engine mount problem please help

well i have a 98 chevy malibu ls v6 3.1L i was told there are 3 engine mounts on this car which could be wrong i just got the car so im not sure on all that, any on to the problem i had my uncle take a look at the car to check it out and he noticed that when i step on the gas the front of the engine pops up a little bit, so he thinks the center engine mount could be cracked or broken all together, so my question is where exactly are all the mounts and what would be the best and cheapest way to reach and replace them. IF YOU KNOW WHAT I NEED TO KNOW PLEASE RESPOND TO THIS MESSAGE OR EMAIL ME DIRECTLY AT [email protected] please include any pictures if you can

thank you for your time