I don't understand how to find the molecular ion peak, how many carbon atoms in the structure, chlorine atoms, bromine atoms, and the base peak? I would like some help understanding this please

5. Consider the mass spectrum shown below: a. What is the m/z of the molecular ion peak? 86.0 b. How many carbon atoms are found in this structure? 5 c. How many chlorine atoms are found in this structure? d. How many bromine atoms are found in this structure? e. What is the m/z of the base peak? 43.0