UnityEngineComponent Velocity Error How do I fix it?

I am very new to unity and I am getting this error.

I really have no clue what to do to fix it so I hope someone can help me.

UnityEngine.Component' does not contain a definition for velocity' and no extension methodvelocity' of type `UnityEngine.Component' could be found. Are you missing an assembly reference?'

velocity' and no extension method

using UnityEngine;

namespace UnitySampleAssets._2D

public class PlatformerCharacter2D : MonoBehaviour

private bool facingRight = true; // For determining which way the player is currently facing.

[SerializeField] private float maxSpeed = 10f; // The fastest the player can travel in the x axis.
[SerializeField] private float jumpForce = 400f; // Amount of force added when the player jumps.

[Range(0, 1)] [SerializeField] private float crouchSpeed = .36f;
// Amount of maxSpeed applied to crouching movement. 1 = 100%

[SerializeField] private bool airControl = false; // Whether or not a player can steer while jumping;
[SerializeField] private LayerMask whatIsGround; // A mask determining what is ground to the character

private Transform groundCheck; // A position marking where to check if the player is grounded.
private float groundedRadius = .2f; // Radius of the overlap circle to determine if grounded
private bool grounded = false; // Whether or not the player is grounded.
private Transform ceilingCheck; // A position marking where to check for ceilings
private float ceilingRadius = .01f; // Radius of the overlap circle to determine if the player can stand up
private Animator anim; // Reference to the player's animator component.


private void Awake()

// Setting up references.
groundCheck = transform.Find("GroundCheck");
ceilingCheck = transform.Find("CeilingCheck");
anim = GetComponent<Animator>();



private void FixedUpdate()

// The player is grounded if a circlecast to the groundcheck position hits anything designated as ground
grounded = Physics2D.OverlapCircle(groundCheck.position, groundedRadius, whatIsGround);
anim.SetBool("Ground", grounded);

// Set the vertical animation
anim.SetFloat("vSpeed", rigidbody2D.velocity.y);



public void Move(float move, bool crouch, bool jump)



// If crouching, check to see if the character can stand up
if (!crouch && anim.GetBool("Crouch"))

// If the character has a ceiling preventing them from standing up, keep them crouching
if (Physics2D.OverlapCircle(ceilingCheck.position, ceilingRadius, whatIsGround))
crouch = true;


// Set whether or not the character is crouching in the animator
anim.SetBool("Crouch", crouch);

//only control the player if grounded or airControl is turned on
if (grounded


private void Flip()

// Switch the way the player is labelled as facing.
facingRight = !facingRight;

// Multiply the player's x local scale by -1.
Vector3 theScale = transform.localScale;
theScale.x *= -1;
transform.localScale = theScale;




}

Required, but never shown

Required, but never shown

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