Can someone help me please

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)