1.Given that $(2,-7)$ is on the graph of $y = f(x)$, find a point that must be on the graph of $y = f(x - 3)$. Express your answer as an ordered pair $(a,b)$ where $a$ and $b$ are real numbers.
2.Given that (3,15) is on the graph of y=f(x), find a point that must be on the graph of y=f(x)-7 . Express your answer as an ordered pairs (a,b) where a and b are real numbers.
3. Given that(-2,3) is on the graph of y=f(x) , find a point that must be on the graph of y=f(2x+1)+3. Express your answer as an ordered pair(a,b) where a and b are real numbers.