Answer:
hello in spanish is hola.
you would respond to a hola with hola te ves muy bonita ahora (hi you look very pretty today) or hola como estas?
for how are is hola como estas.
how are you doing ( como estas haciendo).
hows it going (como te va?)
how are you doing, hows its going,how are you, are basically the same thing in spanish though. you can say como estas for either.
Explanation: