A woman drives an SUV that gets 15 min//gal (mpg). Her husband drives a hybrid that gets 60mpg. Every week, they travel the same number of miles. They want to improve their combined mpg. They have two options on how they can improve it. Option 1: they can see tune the suv and increase its mileage by 2 mpg and keep the hybrid as it is. Option 2 : they can buy a new hybrid that goes 80mpg and keep the SUV as it is. Which option will give them a better combined mpg?