I have lots of questions help me out

Which is the focus of a parabola with equation y2=4x

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.