hi I need help with this question please

In a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy eld. She ipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 305 trials, the touch therapists were correct 145 times. Complete parts [a] through (d). a. Given that Emily used a coin toss to select either her right hand or her left hand, what proportion of correct responses would be expected if the touch therapists made random guesses? (Type an integer or a decimal. Do not round.)