Combine 2 Queries (from SAME table) into a SINGLE query

SELECT SYSTEMTYPE,ProductiveTime,MachineDownTime,
Floor(t_inner.ProductiveTime/ 3600) || 'hr:' || LPAD(Floor(Mod(t_inner.ProductiveTime,3600) / 60),2,0) || 'min' AS Productive_Time
,Floor(t_inner.MachineDownTime/ 3600) || 'hr ' || LPAD(Floor(Mod(t_inner.MachineDownTime,3600) / 60),2,0) || 'min' AS MachineDown_Time
FROM
(SELECT SYSTEMTYPE,
sum(TIME_TEST + TIME_STEP) AS ProductiveTime
,sum(TIME_IDLE) AS MachineDownTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE        (SYSTEMTYPE = '0005-072') 
                          AND (TS_START >= to_date('13/01/2014', 'DD/MM/YYYY')) 
                  AND TS_End <= to_date('17/01/2014', 'DD/MM/YYYY') +  1 + (1/1440) +(59/86400)
                          AND MONO != '9999999999'
GROUP BY SYSTEMTYPE) t_inner