PLEASE HELP what are the co ordinates of the 4th corner

Umm.. just started this 2day and its not on my notes(p′︵‵。)

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.