Hi, can I get help with this stats question? Thank you so much!

Question: A test of weld strength involves lading welded joints until a fracture occurs. For a certain type of weld, 80% of the fractures occur in the weld itself while the other 20% occur in the beam. A number of welds are tested and the tests are independent. a) Find the probability that the rst beam fracture occurs in the third trial. b) Find the probability that the rst weld fracture occurs in less than three trials. c) Find the probability that the rst beam fracture happens on the third trial or later? d) Find the expected value for the beam fracture? e) Find the expected value for the weld fracture? f) Find the standard deviation for a beam fracture? 9) Find the standard deviation for a weld fracture