Please can you help me with these questions! I am struggling a lot.

1} 2) 3} 4) How fast would you have to move toward a source that is emitting Bllez in order to hear the pitch shifted to 12 5.3Hs)? What type of vehicle would you need to accomplish this? You decide to recreate an early Doppler experiment; you have two instruments, both tuned to play ddHs. You have one on a railcar as it moves toward you and one beside you while they both play ddHs. You observe a beat frequency of 2.? His. How fast is the railcar traveling? A friend has a speaker that plays 1221Hs and drives by you in a car and you hear 123?}12. as the car comes toward you. What frequency would you hear after the car has passed you and is travelling away? Draw a ray tracing for plane mirror with an object, 4.5cm tall, placed ?.3cm in front of a mirror. Complete a scale ray tracing and measure the height and position of the image. Describe the properties of the image