CC3551E: CC3551E power supply issue and crystal issue

Part Number: CC3551E

1.In the SCH reference design for CC3551E , are the 3.3V and 1.8V voltages supplied by LDO or DCDC?if using DCDC for 3.3V and 1.8V,which will affect the performance of Wifi/BLE?

2.Can use the frequency tolerance ±7ppm &load capacitance(CL) 8pF as the 52Mhz main crystal?which will affect the performance of Wifi/BLE?