I am a  beginner : Not able to solve Trailhead challange for-Developer Beginner :Visualforce Basics-Displaying Records, Fields, and Tables-Create a Visualforce page which displays a variety of output fields
Create a page which displays a subset of Opportunity fields using apex:outputField components. Bind the Name, Amount, Close Date and Account Name fields to the apex:outputField components.
The page must be named 'OppView'.
It must reference the Opportunity standard controller.
It must have an apex:outputField component bound to the Opportunity Name.
It must have an apex:outputField component bound to the Opportunity Amount.
It must have an apex:outputField component bound to the Opportunity Close Date.
It must have an apex:outputField component bound to the Account Name of the Opportunity.

What I had tried is craeted OppView Page with below code:
<apex:page standardController="Opportunity" tabStyle="Opportunity">
    <apex:pageBlock >
        <apex:pageBlockSection title="Opportunity Information">
           Opportunity Name <apex:outputField value="{!opportunity.name}"/>
           Opportunity Amount <apex:outputField value="{!opportunity.amount}"/>
           Opportunity Close Date. <apex:outputField value="{!opportunity.closeDate}"/>
           Opportunity Account Name   <apex:outputField value="{!opportunity.accountId}"/>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:page>

 while checking challange got below error
Challenge Not yet complete... here's what's wrong:
The page does not include a apex:outputField component bound to the opportunity account name.

Please suggest