Cuál es el resultado de la suma de 12/3 + 3 1/2

Can someone me and do the problem plz so i can understand it more better

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?