How to reverse menu or function exclusions for a system defined responsibility like System Administrator??

Hi Experts,
One of our students have excluded the responsibility define function and user define function from the "System Administrator" responsibility in our test instance, which resulted in disabling of responsibility creation and user creation form.  Can anyone here explain how to resolve this issue??
Thanks.

Your DBA should be able to help you..........

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    USEREXIT_SAVE_DOCUMENT_PREPARE
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    These start from the word EXIT_ followed by the program name and then followed by a three digit number.
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    We use SAP transactions CMOD and SMOD to manage exits. Before implementing an exit , it is required to create the project by using CMOD
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    An exit can be coded only once.
    FUNCTION EXITS
    These are used to add functionality through ABAP code . These start from the word EXIT_programname_NNN ending in a 3 digit number. No access code is required to implement any tupe of exit including function exits.
    The function exits are called from the standard SAP program in the form
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    To implement the FUNCTION EXITs first of all the project is created and a suitable enhancement package is selected and from its compnents the function exit to be implemented is selected and on double clicking it the exit code will appear in ABAP EDITOR(se38) where a Z include will be found and the customer code should be entered in this include.
    e.g.
    ADDING A DEFAULT SOLD-TO-PARTY in Sales Order Creation
    To show a default sold-to-party in this field when the user creates a sales order (VA01) we can use a function exit .This function exit is located in enhancement no V45A0002 . Before we can choose the exit we have to create a project in CMOD after that enter V45A0002 in the enhancement field and click on the components . In the components you will see the exit EXIT_SAPMV45A_002 . This exit is used for our purpose.
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    Double clicking on this include and it will prompt us that this include does not exists do you want to create this object ,select yes and the include will be created .In this include we can write our own code that will fill the field E_KUNNR.
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    The field exits are managed,created,activated through program RSMODPRF. The field exit is associated with a data element existing in ABAP dictionary and hence to the screen field using that data element.
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