First, find the total number of blocks south Janet is from her starting point by subtracting the blocks she walked north from the blocks she walked south: 8 blocks - 3 blocks = <<8-3=5>>5 blocks
Then find the number blocks she walked west: 3 blocks * 7 = <<3*7=21>>21 blocks
Then find the number of blocks she walked east: 8 blocks * 2 = <<8*2=16>>16 blocks
Subtract the number of blocks she walked east from the number of blocks she walked west to find how many blocks west of her starting point she is: 21 blocks - 16 blocks = <<21-16=5>>5 blocks
Add the number of blocks she needs to walk north to the number of blocks she needs to walk east: 5 blocks + 5 blocks = <<5+5=10>>10 blocks
Finally, divide the distance she needs to walk by her speed to find how long she'll spend walking: 10 blocks / 2 blocks/minute = <<10/2=5>>5 minutes
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