A nurse is preparing to administer benztropine mesylate 3 mg IM to a client who has schizophrenia and is experiencing an extrapyramidal reaction to an antipsychotic medications. Available is benztropine mesylate injection 1 mg/mL in 2 mL ampules. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)