1. (4 pts) Use R as a calculator to find numeric answers to the following a. 1+2(3+4) b. 43+32 c. (4+3)(2+1) d. (3+41+2)2 2. (5 pts) Create the following sequences: - Note: use seq() or rep(). a. "a", "a", "a", "a" b. 1,3,,99 (the odd numbers in [1,100] ) c. 2,2,2,3,3,3,4,4,4 d. 2,3,4,2,3,4 e. 0,25,50,75,,975,1000 3. (2 pts) What happens when you mix types inside a vector? Run the following codes and inspect the data types of the below objects. - Hint: use class. x1