Please show full solution please and thanks. Have a nice day!

Assignment Problem Twenty-One - 2 (Registration Requirements - Small Supplier Exemption) Clarisa Cole began operating a storefront business making specialty sandwiches plus offering catering services. The business opened February 4, 2020, and is operated as a sole proprietor- ship. Clarisa decided not to voluntarily register for the GST. She operates in a province that is not harmonized with the HST. Calendar quarterly sales of taxable supplies from her business since the business began up to and including June 30, 2021, are as follows: January 1 to March 31, 2020 $ 6,200 April 1 to June 30, 2020 9,000 July 1 to September 30, 2020 10,200 October 1 to December 31, 2020 27,500 January 1 to March 31, 2021 42,300 April 1 to June 30, 2021 31,700 Required: Clarisa wants to delay registering for the GST as long as possible. As her accountant, based on the following assumptions, let her know (1) when she has lost small supplier status, (2) when she is required to begin charging and collecting GST, and (3) when she is officially required to register for the GST with the CRA. Situation 1: Assume that all sales occur evenly throughout each calendar quarter and that the first sale in February 2021 occurs February 3. Situation 2: Assume that Clarisa catered a New Years' Eve event on January 1, 2021, billing $32,000 without GST. The remaining $10,300 of sales in the first calendar quarter of 2021 was earned evenly throughout February and March 2021 after Clarisa returned from a January winter vacation. Situation 3: Assume that the sales in the fourth calendar quarter of 2020 (October 1 to December 31) were $37,500 instead of $27,500 and that the sale that exceeded the $30,000 small business limit took place December 14