Find the equation of circle having centre with (4, 5) and radius 5. Find also a point at the
circumference.

Step-by-step explanation:

Simply use the general equation of a circle to obtain its equation given the center. Because radius is 5 units, this may be referred to the 3-4-5 triangle, meaning the point on circumference is 3 units across in the x-direction and 4 units up in the y-direction.

its a straight line parallel to the time axis

i think is g(1)=-1.

hope that i can