JavaScript Taskbook Level 9.3

Задание 1

Given an array of words, get a random word from this array that starts with a given letter.

Задание 2

Let's say we have a date 22.02.2017. This date has 4 twos. Find all dates with 4 twos in the current century.

Задание 3

Given an array of points:

javascript[
  [1, 2], [2, 4], [3, 8], [4, 16], [5, 32]
]

Plot these points on the graph.