please help, computer architecture

To convert microseconds so to seconds #> 1 x 1048 92615 x 1046 0092615seconds Computer A 18) A processor operates at a clock rate of 16 GHz yet has a varying CPI for different instruction types. A given program has 400 ALU instructions which take the processor 7 cycles to cycles to complete each instruction. It has 300 memory instructions that take 12 cycles to cycles to complete each instruction. It also has 90 branching operations that take 21 cycles to cycles to complete each instruction. How long does it take to execute this program? Give the answer in milliseconds 19) A processor operates at a clock rate of 1.1 GHz yet has a varying CPl for different instruction types. A given program has 200 ALU instructions which take the processor 10