While riding her bike to the ocean and back home 66 times, mandi timed herself at 52min52⁢min, 48min48⁢min, 56min56⁢min, 55min55⁢min, 53min53⁢min, and 59min59⁢min. she had set a goal of averaging 5252 minutes for her rides. how many minutes will she need to spend on her seventh ride to attain her goal?