A mechanical engineer who was unemployed for 5 years decided to open a medical clinic. He puts a sign outside the clinic: ""A cure for your ailment guaranteed at $400; we'll pay you $1,000 if we fail."" Doctor Ed walks by the sign and thinks this is a good opportunity to earn $1,000 and goes to his clinic. The doctor says "" Sir, I have lost my sense of taste."" Engineer replies ""Nurse, can you please bring the medicine from box 19 and put 3 drops in the patient's mouth."" The doctor immediatel…