Problem 4: Functions Answer the questions below by examining the following functions: Let R+ be all the non-negative real numbers (i.e. R+ = {I E RI >0}. The domain and codomains of each function are given as: f:R+ R : RRO h: RR i. Is f injective (one-to-one)? Explain why or why not in one sentence. ii. Is f surjective (onto)? Explain why or why not in one sentence. iii. Identify which functions have inverses. Why do they have inverses while others do not? iv. Identify the range of each of the functions