DNA segment, the RNA transcribed and the translation

I dont understand this stuff at all.  can someone please help, i have a couple of questions like this.  thanks.

Using the following DNA segment, the RNA transcribed and the translation

DNA 5'  ATG TTC GGG CCT AAC TGC CCG GGA AGG TGA 3'
DNA 3'  TAC AAG CCC GGA TTG ACG GGC CCT TCC ACT 5'

RNA 5' AUG UUC GGG CCU AAC UGC CCG GGA AGG UGA 3'
Protein  met  phe   gly     pro   asn   cys    pro    gly    arg      x

DRAW an example of each of the following (circle the nucleotide that has changed):

A Missense Mutation:

A Frameshift Mutation:

A Point Mutation: