Komma i en indskudt sætning ?

Hej Forum.

Jeg er ikke så skarp til engelsk og slet ikke engelsk komma. Derfor ville jeg høre, om kommateringen i nedenstående sætning 1 er rigtig (jeg er især i tvivl om den indskudte sætning). Herudover må i også gerne kigge de to andre sætninger igennem for fejl!  På forhånd tak!

Sætning 1:

"The studies are showing that the older workers, compared to young workers, are more loyal to the company, have fewer days lost through illness, and are more productive"

Sætning 2:

"If this quotation really expresses the average employer’s attitude towards manpower there will be a huge problem when the big generation of “baby boomers” (people born from the 1940s to the 1960s) are thrown out the door by the employers in the years to come"

Sætning 3:

As a result the generation Y people do not have to fight for a job in the same way as people from earlier generations did when they were the new generation on the labour market.

Sætning 4:

"It is a kind of opposition (modstand!?) to accept that tasks can be done in another ways than normally"