<image> eating bananas.
_Each basket contains 400 bananas.
Group A of monkeys eats 120 bananas per day, and Group B of monkeys eats 90 bananas per day.
(1)_Is one basket of bananas enough for Group A to eat for 3 days?
(2)_How many more bananas does Group A eat compared to Group B in one week?
(3)Roughly how many days will three baskets of bananas be enough for both groups of monkeys to eat?
(4)Please propose a math problem and solve it.