you are spending unconfirmed transactions and until those confirm your new ones won't.
your first tx has a high fee, spending another high fee tx just wait a little and these two should confirm in next 1-2 blocks
your second tx has a low fee, spending another low fee tx but that one is the result of 3 other txs with higher fee. those high fees will confirm but these last two will be stuck unless you use an accelerator such as this:
https://pool.viabtc.com/tools/txaccelerator/ or pay higher fees for them.
your 3rd tx is spending 1 unconfirmed transaction both having high fees. these also will be confirmed fast.
p.s. you can use blockchain.info's advance view to see the output links. when you see a "red U" there, that is an unconfirmed transaction, you can click on the Output link in front of it to see what transaction output your tx is spending. look at their fees and if they are higher than what this site
http://bitcoinfees.21.co/ suggests it means they are high priority. the lower the fee, the less priority it has and the longer it will take for it to confirm.
