TEKTUBE Maxx Flex 4105100100 100' Non Metallic Liquid Tight Conduit, 1" Dia x 100 ft

Is this good for electrical wiring for a hot tub? #6 thhn 4 wire?

Any suggestions as to how to get the kinks/bends out of the conduit? Thanks!

I am needing some flexible conduit to bury and run electrical (115V) inside. Is this burial rated?

would this be good for burying a landline phone line?