DQuestion 16 1 pts Using C++11: What data type does the compiler determine for the variable cost in the following statement? auto cost-14.95; O char 0 int O double O bool O string D | Question 17 1 pts You must have a for every variable you intend to use in a program. O literal value o purpose O memory space O None of these O variable definition D | Question 18 1 pts Which of the following lines must be included in a program that has string variables