Asking about this question below. please give me detail explanations and right answers. thanks so much!

GreenPower company spends $35,000 on 700 machine hours that produces 1,000 units. The company was budgeting to produce 1,200 units at a budgeted rate of $45 per machine hour. Each unit was budgeted to use 30 minutes of machining time.

a) Prepare a VMOH variance analysis; ensure to calculate all relevant variances.

b) Prepare the journal entries associated with the VMOH variance analysis including the actual spend, the amount allocated to work in process and the write off of variances.