FIFO access

hi.
I'm writing my own embedded application with Mpu6000, while host MCU is connected through SPI IF to Mpu6000.
I have a couple of question about FIFO access:
1. FIFO_COUNT read should be:
1.1 1st option => Send 0xF2 + read byte and send 0xF3 + read byte.
1.2 2st option => Send 0xF2 + read byte + read byte.
2. Fifo read sequence is:
2.1 Send 0xF5 (read access to 0x75 register).
2.2 Read 2N bytes while N is FIFO_COUNT.
3. I'm using only accelerator and gyro sensor, so the data in FIFO should be organized in a quants of 6 words(word = 2B).
Although, can I access FIFO_COUNT at 20MHz clock or I should use 1MHz clock.