Please help! Do ASAP very easy

What is the equation of the following graph in vertex form? parabolic function going down from the left through the point zero comma twelve and through the point two comma zero and turning at the point four comma negative four and going up through the point six comma zero and continuing towards infinity courtesy of texas instruments a: y = (x − 4)2 − 4 b: y = (x + 4)2 − 4 c: y = (x + 2)2 + 6 d: y = (x + 2)2 + 12

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?