<u>ANSWER TO PART A</u>
The given triangle has vertices 
The mapping for rotation through
counterclockwise has the mapping

Therefore



We plot all this point and connect them with straight lines.
ANSWER TO PART B
For a reflection across the y-axis we negate the x coordinates.
The mapping is

Therefore



We plot all this point and connect them with straight lines.
See graph in attachment
Answer:
y=154
Step-by-step explanation:
y/7=22
We simplify the equation to the form, which is simple to understand
y/7=22
Simplifying:
+ 0.142857142857y=22
We move all terms containing y to the left and all other terms to the right.
+ 0.142857142857y=+22
We simplify left and right side of the equation.
+ 0.142857142857y=+22
We divide both sides of the equation by 0.142857142857 to get y.
y=154
The factor of this expression is 67. Hope this helps! =)