1. Query and display all the accounts in a tabular format on a visualforce page. 2. Display the columns name, phone, address. 3. The name should be a hyperlink and on click of the link display contact

<apex:page controller="AccountConOppC" sidebar="false">
    <apex:form >
        <apex:pageBlock title="AccountTable">
            <apex:pageBlockTable value="{!Acclst}" var="A">
                <apex:column headerValue="NAME OF THE ACCOUNT" > 
                    <apex:commandLink value="{!A.Name}" action="{!showDetails}" rerender="conttable,opptable">
                        <apex:param value="{!A.Id}" name="idForConts" assignTo="{!recid}"/>
                    </apex:commandLink>
                </apex:column>  
                <apex:column value="{!A.Phone}"/>
                <apex:column value="{!A.BillingStreet}"/>
                <apex:column value="{!A.BillingCity}"/>
                <apex:column value="{!A.BillingState}"/>
                <apex:column value="{!A.BillingPostalCode}"/>
                <apex:column value="{!A.BillingCountry}"/>
            </apex:pageBlockTable>
        </apex:pageBlock>
    </apex:form>
    <apex:pageBlock title="Contacts">
        <apex:pageBlockTable value="{!contacts}" var="con" id="conttable">
            <apex:column value="{!con.FirstName}"/>
            <apex:column value="{!con.LastName}"/>
            <apex:column value="{!con.Email}"/>
        </apex:pageBlockTable>
    </apex:pageBlock>
    <apex:pageBlock title="Opportunities">
        <apex:pageBlockTable value="{!opportunities}" var="opp" id="opptable">
            <apex:column value="{!opp.Name}"/>
            <apex:column value="{!opp.StageName}"/>
            <apex:column value="{!opp.CloseDate}"/>
        </apex:pageBlockTable>
    </apex:pageBlock>
</apex:page>

Controller:

public class AccountConOppC {
    public string recid{get;set;}    
    public list<Account> Acclst{get;set;}
    public List<Contact> contacts {get; set;}
    public List<Opportunity> opportunities {get; set;}
    public AccountConOppC(){
        Acclst = [SELECT Id, Name, Phone, BillingCountry, BillingPostalCode, BillingState, BillingCity, BillingStreet FROM Account LIMIT 10];
        contacts=null;
        opportunities=null;
    }
    public void showDetails() {
        contacts=[SELECT Id, FirstName, LastName, Email FROM Contact WHERE AccountId=:recId];
        opportunities=[SELECT Id, Name, StageName, CloseDate FROM Opportunity WHERE AccountId=:recId];
    }
}