Trying to understand how to solve this:

In a regression model, with Human Resources data to measure job score performances of workers (Y) based on their scores on a test (X), following a trial period. With a sample of 22 workers, these were the estimates:

Sum of Xi= 2193

SSxx=1820.773

b0=-85.6617

b1=1.75812

MSE=59.16687

sb1=0.18027

1-What is the P-Value of the test to see if the model is useful in predicting the job test scores?

With the following information:

y(hat)i=-145.069+0.38432x1+0.12914x2+1.49277x3+0.33924x4

sst=9629.86364

standard error=3.38805

2- What is the value of the test statistic to test the how useful this model is?